TP-Link Archer T2U Plus

sudo apt update
cd
sudo rmmod r8188eu.ko
git clone https://github.com/aircrack-ng/rtl8188eus.git 
cd
cd rtl8188eus/
sudo -i
echo "blacklist r8188eu.ko" > "/etc/modprobe.d/realtek.conf"
exit
make
sudo make install
sudo modprobe 8188eu
sudo iwconfig

remove and connect wireless adapter if it is not shown
let us assume that it is shown as wlan1 in iwconfig
wlan1 will be shown to be set to managed mode

sudo ip link set wlan1 down
sudo iw dev wlan1 set type monitor
sudo ip link set wlan1 up
sudo iwconfig
 
You should be able to see wlan1 set to monitor mode now