SOLVED: Fanart not pulling images

[theguymadmax]

Is the fanart plugin reliant on TMDB IDs?

Yes, they use the same id.  Ex:
https://www.themoviedb.org/collection/98...uage=en-US
https://fanart.tv/movie/9818/mortal-kombat-collection/

In my testing collection images for both tmdb and fanart would not pull if there was not an associated TheMovieDb Box Set Id in the movie's metadata, which could happen if you use an external nfo manger and not jellyfin's default scrapers.