UPDATE: I just purchased an "upgraded" version of the Inateck KU5211 USB expansion board, and it works perfectly.  My Dell XPS 8950 recognized it as soon as I booted up after installing the board.  Device Manager showed this device and reported that it was working with the driver that I expected to see.  I didn't have to install the driver; it was true "plug and play".  While searching on Amazon for a replacement for my original card (which never did work on my XPS 8950), I noticed that the card had a new name.  In the manufacturer's  detailed description, they noted that this was an upgraded version.  In the Questions and Reviews section, several customers mentioned that it worked on their XPS 8950 computers.  So, I decided to give it a chance.  The new board looks identical to my old one, but now it is marked with "Rev. 1.1". If anyone is interested in this board, go to Amazon.com and Search for "Inateck PCIe to USB 3.2 Gen 2 Card".  It is the RedComets U21 model for $39.99, which is a good price for all the capability it provides.
So I found out the hard way (and 2 8950’s later) that Asmedia based USB cards don’t work with Dell/Windows 11/8950/whatever. So what are (if any) other options to add a USB (preferably Gen 2 2x2) card in the computer? No hubs, front USB suggestions or daisy chaining please. 
XPS 8950, what PCIe x4 USB cards work?