Jellyseerr is the closest to what you're looking for. It integrates with Radarr and Sonarr to request new downloads. You can use it to get suggestions by a myriad of ways. By streaming service, by imdb score, overall popularity and so on. It integrates with Jellyfin to use Jellyfin users for authentication and you can directly start a movie from Jellyseerr to watch in Jellyfin.

They are currently merging with Overseer which is the same thing for Plex. The new app will be called Seerr. No idea how far along they are with the merge.