my dell has an ac7260HMW card in it, described here:
Intel® Dual Band Wireless-AC 7260: Product Brief
there appears to be a few variants of them, the key is whether it's an M.2 or USB/HMC. Perhaps all the problematic cards are a 7260HMW variant?
I have been looking for a 6235 instead, which comes as 6235ANHMW:
Wireless Products Technical Documents
as far as I know my Dell E7440 doesn't have whitelistings in its BIOS, but my work's Lenovo T540p almost certainly does so I can't switch in a new card.