Fwiw there’s a new feature in Plex you have to opt into but the Sonarr and Radarr devs figured out how to use it. So you can make it so things people add to their watchlist on Plex get sent to the 'arrs. Like I have it auto add movies and search for them with the typical profile and then add TV shows unmonitored and send me a text message.
Really simplifies everything. Like now my grandma doesn’t have to go to a website and stuff. Since even if you turn off the free TV spam the search function will still return things you don’t have and let you naturally add it to your watchlist and even put it in a recently added bar on the watchlist page when it’s there.