Can't bind Proton VPN to qBittorrent on Linux

I like to run qBittorrent on a Linux laptop to try and minimize the risk of Microsoft tracking what I'm doing and to protect my main system from viruses. I'm having an issue with it though. When I go into Advanced and select Network Interface, Proton VPN is not an option there. I only get lo, eno1, wlp4s0, ipv6leakintrf0, and tun0.

How can I get it to bind to the VPN so that I don't have to worry about it freaking out and sending unencrypted data through qBit?

EDIT: I also tried torrenting Ubuntu and killing the VPN just to test it out. It didn't stop downloading and uploading when I did that.