I have a PLEX server/torrent box behind a VPN. I then wrote a fairly simple Apple Shortcut that grabs the magnet link off whatever page I’m on, then shoots the magnet link over the torrent API.
It took some work to set up, but I shared the Apple shortcut with my wife and she now uses it and it’s super easy and convenient. So much so that I need to buy a new hard drive as she’s filled up our 8TB drive with TV shows.