I run wireguard on my Unraid server.
Would I PREFER my edge gateway apps to all be on Untangle - yes. Just like I would prefer my routing apps to be on Untangle (like avahi mdns reflector, which I also have to run in a VM on my Unraid server).
Are there other pretty easy ways for home users to do it outside of Untangle - yes.
As I now have a workaround setup outside of Untangle, I likely would **not** buy wireguard if it were offered as a paid app to home users. They missed their opportunity to get more money from me I guess. And since I have almost 5 years left on my HomePro license, that could have been lucrative. Oh well.