Macbook M1 - unable to load diagnostic mode - power button not working

Hello there,

I have a Macbook Pro M1 (Late 2021), using Sonoma MacOS. Im trying to get into diagnostic mode.

After shutting down, I tried to hold power button for a long time, but it would go straight to the login page, not getting into startup loading option.

I believe the power button is not working properly. Is there a alternative way to access diagnostic mode?