VPN reporting remote WAN IP instead of VPN Ip

[K2Van]

I tried several VPN options (OpenVPN, Wireguard and Tailscale). For all of them I manage to get connected to my LAN machines and connect to services using their IP address. So far so good.

When The traffic hits my Nginx Proxy Manager I get denied access even though the VPN IP ranges are in the access list for that subdomain. Checking the logs I find the WAN IP of the client is reported instead of the VPN IP.

Is there a way to change this such that the VPN IP is reported? I tried about every setting I could find in the OPNsense interface for the different VPN types.