If you cannot access Fastboot mode, or if your PC detects the device as , you must use the Emergency Download (EDL) mode.
The most common way users permanently brick this phone is by clicking in SP Flash Tool without saving the NVRAM partition. How to Unbrick POCO M5S
Just like the Soft Brick method, you need the extracted Fastboot If you cannot access Fastboot mode, or if
If you have tried SP Flash Tool, Bypass Utility, and different USB cables/PCs, and your POCO M5S still shows no signs of life: If you cannot access Fastboot mode