Jellyfin can't identify animes, showing up as folder

[TheDreadPirate]

I think I set up as mixed movies and TV show @Efficient_Good_5784

Yeah, don't do that.  The mixed library is a legacy feature and is poorly supported.  We strongly recommend using separate show and movie libraries.  If your online metadata source says something is a Special, that can go with the show in a Specials sub folder.

If you need things to go together for organization purposes, use collections.

Regardless, specific folder and filenames would aid in further diagnosing if separating the content doesn't help.