DanieleFan
Honestly, the easiest way to accomplish everything you want, might be a Fritz!Box. Sunrise allows the use of third party routers on DSL connections. Please don’t take this as a buying advice, I’m just telling you what the easiest method is.
You can not integrate Wireguard into the InternetBox. You will need other hardware with this feature build in or supporting the installation of a Wireguard-server (Linux PC, ect.).