we never even meet him

Phoebe starts dating a cop, who gets annoyed with a bird singing outside his apartment window in the morning. Instead of simply scaring it away or closing the window he shoots and kills it. Phoebe breaks up with him pretty quickly.

Phoebe runs over a dog with her car by accident. You can’t see it, but you hear a little sound. But the dog survives

In two episodes - one is awful and has it throughout. It's the episode where phoebe and Rachel are fighting on who lives with Monica and who lives with Joey. The other episode is better. It just talks about holding one but doesn't show one. It's the episode where Rachel is scared of the swings.

S05E14 - It is implied that a cat is killed after being sat on.

Chandler is addicted to cigarettes Fun Bobby is addicted to alcohol Monica was addicted to food

Fun Bobby is only "Fun" when intoxicated, which he often is.

No but there is waxing.

S05 E08 - In flashbacks to previous lives, Phoebe was a nurse during two wars and lost an arm in both of them due to an explosion.

In a flashback Chandler get his toe cut accidentally by Monica

In Season 3, episode 3 Joey breaks his arm jumping on the bed but you dont see it.

No, but there is an episode when they show that Rachel has an intense phobia of "things coming close to, or touching eyes", and the others make fun of it. No eye mutilation, but they have to go to the eye doctor in several episodes (problems just mentioned, not explicitely shown).

Joeys head gets squashed in between the door of Monica’s apartment season 10 episode 8. It’s nothing gruesome and the character suffers no injury from it

Phoebe speaks of her mother, who committed suicide, frequently.

WE WERE ON A BREAK

there are a few episodes where phoebe feels spirits in the room with her. none are seen.

In season 8 episode 6, The One With The Halloween Party there is a kid dressed up as a clown that comes trick or treating. Also there is a cookie jar shaped like a clown that can be seen in the background of some episodes

There’s an episode where a man stalks Phoebe thinking it’s her twin sister Ursula, and he continues to do so throughout the episode with Ursula.

In an episode Phoebe gives a massage to an old lady who dies during the session and her soul went in Phoebe. (We don’t see it when it happen) But she leaves at the end of the episode.

Joey gets an acting part as Al Pacino's b**t and is shown in the shower.

You never see vomit in any episodes, just the sound and some motions by the actors. I can't remember the episode names but here's what I do know .. 1) it's an episode about stuff that could have been. In one scene, Rachel is drunk and was married to Barry, but went on a date with Joey who is famous. They are about to kiss when she throws up (loud noises, Rachel's head moves forward and Joey makes reference to it) 2) Monica is trying to figure out Phoebe's grandmothers' chocolate chip cookie recipe and Ross is taste testing. One cookie makes him feel sick. They talk about it, Ross makes a gagging motion and at once point makes it known he is about to vomit then runs to the bathroom. 3) Rachel is pregnant and living with Joey. Ross brings Rachel lunch. She begins to eat a sandwich and then asks Ross, "did you put pickles on this?" Ross explains he did, and Rachel runs to the bathroom and then slams the door. You hear and see nothing, but they talk about food aversions from her pregnancy making her sick. I can't remember any others but I hope this helps!

There is a running gag in one episode of an actor that won't stop spitting on Joey during his scenes.

Yes, many hospital scenes.

Yes, Ross gets a shot in the hospital.

it's often pointed out that pheobe's mom killed herself while pheobe was young

They make fun of Monica for being overweight in the past a lot, it’s quite triggering if you have an eating disorder

Joey makes light of Chandler's sexual assault saying "You're a guy and you got to have sex. What are you complaining about?"

There is one episode in the first season when Chandler and a woman gets trapped in an ATM because there is a black-out. There are some other scenes where people or several people are in very small rooms, but they are not really claustrophobic.

The whole Monica was fat haha thing runs throughout. This could be triggering, I find it depends on my mental state that day

They are in a club in flashbacks in certain episodes, there are strobing effects in them but they don't last long or happen often

Yes, several scenes with childbirth.

No, but Monica struggles with getting pregnant and eventually learns it is impossible. She later adopts but it is an emotional plot line.

Ross tried to kiss his “hot” cousin, in one episode, fortunately he gets stopped

In the plot of a later episode, there is rape by deceit. Monica and Chandler are fighting, and it is the last die she is ovulating, and they want to conceive a child. Chandler says he does not want their child to be conceived while they're fighting, and Monica appears to respect this, and they make up and have sex. As soon as they're finished, Monica admits she was lying and picks up the fight again. In a later scene it also implied that Chandler has committed rape by deceit when she says "You used to tell girls you were a Kennedy!". The fight is resolved when Joey gaslights Chandler saying "You're a guy and you got to have sex. What are you complaining about?" making a joke out of male rape victims. Overall, it is an episode that has not aged well. There is also a tailor who sexually assaults clients in an earlier episode. All the male characters behave towards women they are attracted to in incredibly creepy ways at some point during the show. Joey removes the shower curtain when he gets a female roommate.

There is a lot of kissing and "making out". Sex is not shown explicitly, but sometimes characters are shown afterwards, naked in bed. There is a lot of talk and jokes about sex, and quite a lot of times, when they watch p***o on TV in the background, and the sound effects can be heard.

Chandlers dad is clearly a trans woman but is constantly referred to with male pronouns

No slurs that I can think of but Chandler (and occasionally other characters) is routinely made fun of for acting/seeming ‘gay’ (he is not) and it can be pretty problematic.

Echoing another comment, there's very little racial diversity throughout the show. Like almost none.

No, but there are a lot of homophobic and transphobic jokes—especially in later seasons.

No but lots of problematic gay jokes and plot lines that portray gay people in a negative light. Chandler is often teased for seeming ‘gay’ (he is not); an episode where upon getting a female roommate Joey ‘acts like a woman.’ Ross becomes concerned at one point that his son is playing with a Barbie & is generally hostile towards his ex-wife (who left him for a woman) and her [female] partner. He occasionally gets paranoid about future girlfriends being gay.

Throughout towards Monica. Severe eating disorder content that can be very triggering with its portrayal of obesity and Monica’s new weight being used as a positive and something to aspire to

An episode where Phoebe learns Santa isn’t real and is upset by it.

The ending is heartbreaking in that they leave the apartment - but everyone is happy at the end.

Not really but Joey has a girlfriend who jokingly punches his arm a lot. The ‘friends’ make fun of him for being hurt/upset by it because she is very small and he is supposed to be a ‘man.’ Could be upsetting for men who have been subject to domestic violence and been gaslighted on account of their masculinity.

There are a few nosebleeds and minor injuries (a cut on Rachel's forehead, for example), but no gore, and not much blood shown.

A dog.

Ross falls into an open grave but he is not buried

No but heavy favoritism is shown from parents towards their kids

Joey's Days of Our Lives character Drake Ramoray falls accidentally down the elevator, instantly dying. The production used that as a method to cut him out of the show and the details of the body are gruesome.

A cop shoots a bird.

They could've if Pheobe hadn't saved the from the left philange

There are several scenes when people choke on something (toy parts, or Ross has an allergic reaction and has to go to the hospital).