It’s not a plug-in, but the best I know of is Radarr an indexer for movies, Sonarr an indexer for TV, and Jellyseerr a requester that connects to Radarr and Sonarr.
As far as I'm aware, someone can correct me if wrong, but I don't think a plugin like this is possible as most of the sites likely have their API calls protected. So even if you got the URL you'd still need the authentication information and everything.
As others have said I'd recommend just setting up the AAR programs to automate downloading your favorite tv shows/movies/anime/whatever.