I’ve just tried it with both template and AppVM install and with OpenVPN and Wireguard and it worked.
Are you sure that you’re using the Qubes-vpn-support with my patches?
You need to either download zip from this link:
GitHub - 1cho1ce/Qubes-vpn-support at replace-iptables-with-nftables
Or if you’re using git then:
git clone https://github.com/1cho1ce/Qubes-vpn-support.git
cd Qubes-vpn-support
git checkout replace-iptables-with-nftables
Or just:
git clone -b replace-iptables-with-nftables https://github.com/1cho1ce/Qubes-vpn-support.git