Anyone know how to use a VPN with reverse proxy URLs?

I have caddy for my reverse proxy setup, and adguard home for DNS rewrites, so my services end up looking like "pve.home.arpa" or "immich.home.arpa". This works great, but I'm not able to use it with a VPN.

Adding my adguard home instance as a custom DNS server and enabling LAN doesn't seem to work, Ive tried this with both Mullvad and IVPN, does anyone know a way around this?

I'm not sure if this is because I have stuff seperated across VLANs (personal devices on VLAN 10, infrastructure on VLAN 20, rest of my containers on VLAN 30, and public facing on a DMZ VLAN 90). My PC is 192.168.10.98, and my adguard DNS is at 192.168.20.12.

If this is a dumb question, my apologies - new to all of this.