You show a sctip to Install but how about Uninstall?

[bmullan]

You have the install script:
install-wireguard.bash

would be beneficial to have an equivalent for "uninstall" that would
clean-up (reverse) and changed made.

[bmullan]

Also, maybe you should turn-on your Github Repo's "Wiki" function so Q&A can be done & it also would make it easy to find answers by new people using this.
just an idea.

[samurailink3]

Wiki opened up to everyone (I think, let me know if it doesn't work).

Agreed, an uninstall script would be very beneficial. Not sure when I could get around to this, but it should just involve deleting the configs, stopping wg-quick@wg0, disabling the auto-start, then (optionally) removing the wireguard packages.

If anyone wants to take this on, PRs will absolutely be accepted.