I fixed it by turning off DNSSEC in the Pi hole config and turning it back on

@zenjim I've made progress. I was able to setup eth0 as DHCP and now my router can see the Pi, but the Pi still can't get to the internet

My old router died so I bought an Archer AX1500 and got it all setup. When I try to input the setting to give my Raspberry Pi 4 a reserved IP address, I click Add, then View Connected Devices but the...