I do that with my own router, refurbished x86 box with linux. Entire lan goes over mullvad You can't do it with a regular router.

Any sites that explains how to do that?

get a spare linux machine with two network cards and I can guide you through the rest i use old hp elite desks, super small and powerful

You can achieve it with a 3rd party router, just make sure it's compatible with OpenWrt and there's enough storage to install WireGuard on it, which is quite small but still

Testing to determine if you are a bot!

I'll have to get one.