One way is to use rclone to mount your Real Debrid link onto your server and run plex/Jellyfin using the remote media. That way all your clients talk to the server, so you’ve only got one connection to RD
RDT-client implements the qBittirrent api so you can point radar/sonar at it, and it will make symlinks from your mount to a structured media directory
Plex_debrid is a python script which is a standalone method to get media onto RD. It can take requests from your plex watchlist or ombi/overseerr and will search trackers to grab the release. As plex is less fussy about the file structure of your media, you can just point plex straight at your mount.