I second this request, Split, Unbreakable and Glass is a Collection.

This site has some really bizarre rules at times.

https://en.wikipedia.org/wiki/Unbreakable_(film_series)

https://www.themoviedb.org/bible/collection#59f751209251416e71000057

Just added a tag "Unbreakable collection" to all three. That way you can list all three films and navigate to the other ones

À cause de ce Site qui n'indique pas que c'est une Saga, j'ai commencé par le deuxième film, et je n'ai rien compris, car je n'avais pas vu le premier ! Décidément ce Site est bizarre...

I am not personally familiar with any of the films you've mentioned. This Content Issues thread from May 2020, however, may answer the questions you have.

I get that you haven't heard of the other films mentioned, but that doesn't change the fact that it seems to meet the site's guidelines for a collection. It's a little unconventional, but Glass was created as a direct sequel to both Split and Unbreakable. The main characters from both films are the main characters in Glass, and the movie Glass continues the story arcs that began in both those two films.

@CrashTestKing Please see this report linked to Unbreakable.