Here is another site that lists it as a replacement, in addition to the Ebay seller -
Seems GM replaced PN#84741563 with PN#86537580, google search the new PN and you can find it multiple places online. Mine just arrived today from the Ebay marketplace seller. I updated the thread title to include the new PN# as well.
I had mine wrapped, the screen trim as well for the same reason in a matte black. The shop said they have done a couple of the new SUV's for this same exact complaint, I'll post a few pics this evening.
I ordered the cheaper Huskys for my 2021 AT4, the Xact Contour ones. I only ended up keeping the one for the rear with the seats folded down. I had the same set on my 2011 Tahoe and loved them, they just did not fit this truck well. I also have a set of factory ones for the 1st, 2nd and 3rd row...
After a few rounds with Carmax (bought and returned a black one) and the total loss of my 2011 LTZ Tahoe (shed a tear) we are the proud new owners of a white AT4. It's in the tint shop now and will post some better pics when its back. Very happy member of the GMT 1XX family.