Pi Hole running fine, DNS server not showing pi hole IP. VPN also not working

[deHakkelaar]

Can you post screenshots of your router "DHCP server" settings ?
If it lacks an option to push a DNS server (Pi-hole's IP) to the clients through DHCP, I would recommend to disable the DHCP server on the router and enable the one on Pi-hole as a replacement:

How do I use Pi-hole's built in DHCP server (and why would I want to)?

Using Your Existing Router For Network-wide Ad Blocking You might not need to use Pi-hole's DHCP server: In many home environments, your router also functions as your DHCP server. In this case, you can often set Pi-hole to be the DNS server for your network clients in the router's DHCP (or LAN) settings page, which allows all of your network clients to block ads simply by connecting to the network. Setting it up this way is also what makes Pi-hole very powerful for network-wide ad blocking. W…

Ps. love your handle by the way