In PMs it is looking like we are going to close this.  So before we do I'll just put out there for others reading this what I think resolved this. The computer is new and I had not changed any default settings of Killer CC. During the process of back and forth with Dell support in PMs, I didn't feel comfortable uninstalling all the supporting drivers and re-installing, but I did choose to change the default setting on the bandwidth limits in Killer CC.  The instant I changed the bandwidth limits for upload/download (which were 1500 mbs), all the warnings resolved themselves and never reappeared. I just randomly set it to 1200 mbs download and 1000 mbs upload (both at or above my ISP speed of 1000 mbs), and the warning of not recognizing the AX network has never popped up again. I have verified in network properties that it is still connected using AX protocol (which it always has been, Killer CC just wasn't recognizing it).   
I recently bought a XPS 7590 that comes installed with the Killer Control Center and AX network adapter.  Noticed out of the box it had a recommendation in its Intelligence Engine to consider buying a new access point that has AX wifi capabilities.  We had a AC router at the time and actually it seemed to be slowing down with age and with everyone working from home it was time for a new router anyways after 5 years.  So I bought an RT-AX86U, one of the better ones out there now. The Killer Control Center though still gives me a recommendation though to get an AX access point. I checked the properties of the network (connected to the 5G band, and it very clearly says the protocol I am connected to is Wi-Fi 6 (802.11ax), Network band of 5 GHz, Link speed (Receive/Transmit) of 2402/1729 (Mpbs) and that I am connected using the Killer(R) Wi-Fi 6 AX1650x 160MHz Wireless Network Adapter (200NGW). (see screenshot below for all of this) So why is Killer Control Center continuing to make this recommendation? Also, while I'm here, the other recommendation from Killer CC is to set Bandwidth Limits.  I've done that a dozen times. Is this Control Center just garbage and I should ignore it? Is there a way to get it to recognize the network is AX and stop giving this recommendation? Should I somehow disable it or uninstall it? If so, will I still be able to connect AX speed. P.S. I don't game, I didn't buy the 7590 for that.  Photoshop and other imaging is what I wanted it for, but also watching 4K videos so max speed would be nice. Thanks for your help. [IMAGE]  
XPS 7590 Killer Control AX Problems