I have some experience with WG where I have been using it to remotely connect to my home and one of my business locations (both have pfSense routers).
This is probably more of a networking question but it pertains to my other business location and WG on an OpenWrt router.
My working set up is with my home which is 192.168.1.0/24 and my first business location which is setup with 10.10.10.0/24. Connections remotely to both home and business work well AND connection between home and business work well.
My second work location has long been setup as 192.168.1.0/24 (just like my home location) - connections are not sucessful -- the device , iphone for example, shows a connected VPN , but the work2 router does not show a connection or even a handshake. Also I am wondering - what happens if I connect from my home (Wifi ON my home network) to work2 and there are devices on the same 192.168.1.x ip address ?? Will the connection not work or will it just cause conflicts ?