I'll answer my own question. QoS! Once adjusted those QoS settings, got drastically better test results.

Comcast connection is 1000 Mbps. Cable Modem is NetGear CM1200. Router is TP-Link Archer AX1500. Connected directly to cable modem, getting speedtest.com result of >800Mbps/35Mbps. Connected to...

Logged into router for first time in 6 months, was prompted to update the Firmware. Existing version is 1.3.1 Build 20220401 Rel. 57429(5553) Available version was 1.3.3. Repeated attempts to update...