IP-address like 10.0.x.x is used in several VPN configurations. I’m using wireguard and so this kind of IP-address is also used there. But you need to seperate this from your normal LAN-IP-segment. your router will have 192.168.x.x as ip in your local network. 10.0.x.x is used as overlay network for VPN only. I can access my local machines through VPN when i’m using the normal local IP-addresses like 192.168.x.x and i don’t need to use 10.0.x.x.