@adam1244 said:
How to remove every XXX and 18+ movie
I couldn't seem to find a way to remove every xxx movie.
Is it possible to remove this type of movies?

Is it possible not to receive every movie that has the the Adult Movie condition? Yes, or adult: true
Alias, by default, every API request is made with the condition include_adult: false

Also, it is possible to make Discover filter with the condition certification.lte
https://developers.themoviedb.org/3/discover/movie-discover

certification.lte: Filter and only include movies that have a certification that is less than or equal to the specified value.