Bitcoin node setup through Proton vpn possible?

Anyone able to get a bitcoin node to communicate through proton vpn? Protonvpn does offer port forwarding. but i had no luck. bitnodes.io isnt finding it. https://protonvpn.com/support/port-forwarding/

I got it working but I didn't use port-forwarding. I used split-tunneling.

This excludes Bitcoin Core from going through the vpn and opens up port 8333 to the internet.

If you'd like the details for this, let me know, I'll be happy to post them.