- set Ip range on your router to 192.168.1.15 -192.168.1.15
- enable DHCP inside PiHole Settings > DHCP
- use range 192.168.1.30 - 192.168.1.200
- restart your device inside your network to retrieve new settings
- your device should show up on DHCP leases section
- this is applicable for all device, doesn’t matter if Ethernet or WiFi
- if there are issues you simply could rollback
if this is working well, we could have a look to your DDNS.