I’m using protonvpn setup in my router for all outgoing traffic. Works great but I can’t find anything about opening a port in the vpn without using the app which I can’t do because it’s setup in my router. This is preventing me from using my incoming VPN to connect to my network when I’m away from home.
You should be able to do both. Either configure your routing rules to allow your mobile VPN traffic to go out to the Internet without going over protonvpn, or if you have control over the protonvpn endpoint, install your mobile VPN server there.