Hi! The linked Tutorial Shows You Step-by-Step How to Install TP-Link TL-WN823N N300 Wireless Driver in Debian Buster 10.x GNU/Linux.
And the Debian 10 TP-Link TL-WN823N V1/V2/V3 Setup is based on the Realtek rtl8192EU Chipset Driver Installation.
Especially relevant: in case you can verify it following: How to Check Wireless Card Model on GNU/Linux.
For V2 & V3 see: rtl8192EU Linux Driver Installation
Instead for the Legacy V1:
uname -aGNU/Linux Command Line Tutorial for Beginners