Dell's whitelist means not any Wi-Fi card works in the OptiPlex 7090 SFF
The M.2 2230 slot supports Wi-Fi 6 and Bluetooth 5.x modules, but the card has to be on Dell’s approved list to work.
The M.2 2230 slot supports Wi-Fi 6 and Bluetooth 5.x modules, but the card has to be on Dell’s approved list to work.