(i am lgbtq+) not really, maybe its because might have read a weird translation but some things are described as "queer", (this is a very old book) but nothing bad like the f-slur or anything else
The little prince is, well, little, but the relationship between him and the pilot is more like good friends or a father with a child he wants to protect but can't seem to understand. It is not a romantic or sexual relationship in any way, I don't know if that still counts. Also, it is never revealed how old the little prince truly is, but in the book he is perceived as a child, at least by the pilot, and he talks about adults not understanding certain things.
The main character briefly witnesses the little prince talking to a snake but then steps in because he is afraid that the snake might bite the little prince.
I am actually not sure, it is never revealed whether the little prince actually dies at the end or not. The little prince agreed with a snake that it would bite him to bring him back home to his planet.
Not really falling to their death, the little prince falls down onto the sand at the end of the book, after being bitten by a snake (he agreed on this with the snake beforehand), but it is unclear if he actually dies. He tells the main character before that it will look like he is dying and that he must not come to witness it. The little prince tells the main character he will go home, after the main character is worried about the little prince dying from the snake bite.
I am actually not sure, it is never revealed whether the little prince actually dies at the end or not. The little prince agreed with a snake that it would bite him to bring him back home to his planet.