There are actually relevant to the Mi 9T:

Your PC won't recognize the phone for ADB commands unless this is on: Go to > About Phone .

The Mi 9T is powered by the Qualcomm Snapdragon 730. If you ever brick your phone and need to flash via Emergency Download (EDL) mode, you need the Qualcomm HS-USB QDLoader 9008 driver. Xiaomi has restricted EDL authorization in recent years, so most users will not need this unless they have authorized Xiaomi engineering accounts.

to automatically load ADB, Fastboot, and Qualcomm drivers onto your system. Method 2: Automatic ADB & Fastboot Installer

Allows developers and advanced users to send terminal commands directly to the phone.

Plug the cable directly into the motherboard ports (the back of the PC) for a more stable connection. Try a USB 2.0 port if a USB 3.0 port (blue) is failing. Summary of Driver Details Driver Type Compatible Chipset Qualcomm Snapdragon 730 Fastboot Driver Xiaomi Bootloader ADB Driver Android Universal