Got a weird issue I've never seen before ... Ever since I lost internet service with Xfinity (they got me in their walled garden until I throw $300 at them), both my wired PCs -- Windows 10 on primary

Just bought this router yesterday and after hours of tinkering around, I finally got it to where the DHCP Client List would see (and then let me reserve) the IPs and MACs of all the wireless clients .