Archer T2U Plus has Realtek RTL8821AU chipset not Intel chipset, contact TP-Link or Realtek or Microsoft support or suggested above Dell support. I'd start with TP-Link support and their adapter forum since you installed their propriety driver and it does not work. Here is the link to tha...
TP-Link AC600 USB WiFi Adapter for PC (Archer T2U Plus)- Wireless Network Adapter for Desktop with 2.4GHz, 5GHz High Gain Dual Band 5dBi Antenna, Supports Win10/8.1/8/7/XP, Mac OS 10.9-10.14 Add $32.77current price $32.77TP-Link AC600 USB WiFi Adapter for PC (Archer T2U Plus)- ...