Your Pi-hole is using the address 192.168.212.4 on the wifi interface, but during installation you've told Pi-hole to use the ethernet interface (which would be a cabled connection), and that interface doesn't have an IP address. So you need to run pihole -r and select Reconfigure and go through it again and choose the correct interface.
Another thing is that your router is on 192.168.212.1 and it is the DHCP server. The router is telling clients to use itself (the router) for DNS but it needs to be telling them to use the Pi-hole for DNS.
To fix this, log into the router and locate the DHCP section. It will say DHCP or LAN or something like that (depends on the router model). In there should be a place to enter the DNS setting for DHCP. Change this to be the IP address of the Pi-hole and save the change. The router may well reboot to activate the change.
Once done, have your other devices disconnect and reconnect to the network so they pick up the new settings. Now they should be using your Pi-hole and you will see the hit counter going up on the Pi-hole Dashboard and see entries in the Query Log.