Thank you for your reply. Ok, makes sense.
I have have finally managed to install a supported kernel so that I could actually test it my self.
At the first glance it was a bit confusing the fact that the deleted peer’s folder still existed, and also the fact that the credentials in the Wireguard client seemed to the working (marked the connection as active). But the peer no longer existed in the wg0.conf file, and I was unable to use the tunnel connection in any shape or form other than I was still able to connect to the server.
Anyhow, thank you for clearing things up!