For anyone curious why there are no episodes past The Making of Shang-Chi, trakt collects its episode content from The Movie Database. It is a user content-generated site. TMDB determined that all other episodes have been released as stand-alone documentaries. If you look at Disney+, the Assembled show page ends with episode 6: https://www.disneyplus.com/series/marvel-studios-assembled/3RUQKboZV3FF.

While IMDB and other websites continue to treat each new release as a separate episode, TMDB decided to cancel the series and prevent anyone from being able to add new episodes. You can read the thread here: https://www.themoviedb.org/tv/118924-marvel-studios-assembled/discuss/620589dbf48b3400dbd4a6b7.

It's annoying, but unless anyone can convince TMDB to reverse their decision or get trakt.tv to collect their data from IMDb or elsewhere, it is what it is.