Yes; there are multiple abilities which allow this, and one required element of the story in which a character sacrifices themselves at the end of Act 1.
Kind of? There are multiple scenes where character(s) are temporarily transported to another place, but they are returned. One ending features a character being held against their will.
There are some environments that are meant to look like they are underwater, but the characters do not experience them as if they were (no trouble breathing, swimming, etc.)
One character has a prosthetic arm. Another one is permanently disfigured, partially blinded, and cannot speak due to being injured in a fire in their past.
Yes? There is a way to interpret the way children are treated as abusive, there are children left in perilous situations, emotionally neglected, and forced to do things they don't want to. It's left somewhat up to interpretation.
MAJOR SPOILERS!!! One of the endings involves character A refusing to let character B pass away, keeping B trapped in an altered reality. This ending can be avoided - choose to “fight as Verso” at the end.
I'll try to keep it as vague as possible, but there may still be some spoilers.
Two instances are mentioned in journals - one found early in Stone Wave Cliffs and the other in the open world, on a ridge next to the northern entrance to Forgotten Battlefield - but without any graphic details. There's also an optional boss who's being imprisoned in the Flying Manor and forced to create something against their will.
Some people think a major character's fate in one of the endings is torture, but whether that's really the case is open to interpretation, as we don't get any confirmation of what's really happening to them.
Some warped enemies made up of various human bodyparts, some enemies that look like disfigured people, etc. If you can handle the body horror in Dark Souls games you're probably fine
Before the events of the game, a character perishes in a house fire and another is scarred from the same event. This is not shown on screen however, only mentioned.
In the new area added in the DLC, you can have each character take a ride on a carousel, and Maelle gets sick from it. There's no visual, except for her bending over, and the audio isn't super prominent, but it's there.
Sets frequently defy the laws of physics, and at the end of Act 2 the entire structure of the world is changed. No characters directly struggle with delusions or hallucinations, although there are strong connections to unhealthy escapism.
Reality and identity are played with by multiple characters/entities, although I personally wouldn’t classify it as traditional dissociation/depersonalization/etc.
At one point, Gustave is told to yell a password really loudly, so he screams "GET OUT OF MY WAY!" It's revealed there was no password, however, and the group is allowed to pass.
A character discusses the past when she didn't know she was pregnant and miscarried after a traumatic event. No visuals or flashback are shown. Earlier in the story, she is shown an illusion of people she's lost and one of them is of her lost baby.
There is a scene near the beginning where you can come across two "life enjoyers" making suggestive moans. Interact with them 33 times, and they will shoo you off and give you a Colour of Lumina.