Ive got it working with wired, didn't try wirelessly, I'm not sure what you mean by just right? Like allowing aa over wired connections? That's the only setting I had to allow, and it kind of seems important that it's off by default.

Also wireguard is not an app it's a protocol for private connection to networks( OpenVPN alternative) also there are a bunch of OpenVPN apps available on Android you could try.