Hi,
on my Brume2 I do not see any Client IP addresses in the AdGuard Log only local host is listed instead of the client. But the Client uses the AdGuard.
If you do need VPN policies, here is an article on adding a Pi Zero to the USB port to keep adguardhome available for DNSMasq to forward to (I mentioned it before but forgot where I read the article).
Thank you very much for the link - it helped me to unterstand the problem. But unfortunately it did not solve it. I setup a port forward rule to the local IP but even after reboot it did not help.
I do not use any VPN. And as DHCP the Fritz Box acts. Has this maybe to do with the Drop-In-Mode why it does not work for me?