[rane]

What could be the issue with exposing WireGuard at a random port to the public internet?

It works over UDP so it doesn't even send any acknowledgement or error response to unauthenticated or non-handshake packets.

[_heimdall]

There may not be an issue at all, I'm just gun shy about opening any ports publicly. I don't do networking often and have never focused on it enough to feel confident in my setup and maintenance.