I just wanted to follow up to my post from October 2019. I just installed CentOS 8.1 and my WIFI card is now detected and works properly! So I'm a happy camper again, I guess I just had hardware that was too new and CentOS 8.0 didn't have the driver for my WIFI card but CentOS 8.1 *DOES* have it. Good thing, Both RedHat and DELL says it is "completely supported". I was seriously thinking about sending the hardware back to Dell to reorder a configuration that worked, but now I don't have to, there is now driver support for the Intel AX200 WIFI card. I just had to unexpectedly wait a few months. - Thanks - David