Isn't this use case covered in the article that you mentioned? Specifically under the very last heading. https://www.procustodibus.com/blog/2021/03/wireguard-a

Isn't this use case covered in the article that you mentioned? Specifically under the very last heading. https://www.procustodibus.com/blog/2021/03/wireguard-allowedips-calculator/#a-better-alternative https://www.procustodibus.com/blog/2021/03/wireguard-allowed... That is you could specify a single Wireguard peer that you send all the traffic to by setting AllowedIPs to 0.0.0.0/0 and also set more specific routes than 0.0.0.0/0 in the main routing table of your device in order to send traffic to certain networks via a different gateway.