Not uncommon. I run wireguard in a docker container for Mullvad and then set my qBittorent container to use the network of the wireguard container. If you do something like this you’ll need to set routing rules on the VPN so the web interface of your torrent client is accessible over your LAN for the *arr stack. The wireguard docs have a decent guide on how to do this, shouldn’t be a problem on OpenVPN either.