having a similar issue. removed wireguard interface and toggled off wireguard from VPN>WireGuard>Instances Enable WireGuard.
still see wireguard in Firewall: Groups.
how can i remove? thank you!

https://imgur.com/a/sQmO69Q
or is just merely stating it is available?
still see wireguard in Firewall: Groups.
how can i remove? thank you!
https://imgur.com/a/sQmO69Q
or is just merely stating it is available?