Power button

[AliAnn]

Won't turn off and restart.

Only gives Hey Google ??

[LongHiker]

@AliAnn If you want to use the side button to power off the phone:

1. Open phone settings
2. Click on Advanced features
3. Click on Side button
4. Click on Long press
5. Change it to Power off menu 

[shortskid_5]

Or run dionostix

[nullandvoid]

Do you mean diagnostics? No need for that, it's a settings option.

[userdmjRmqG38F]

I have the same problem with my phone Samsung Galaxy A14 5g

[RevengeOneUI]

It's a settings option. See @LongHiker's response to the original post for how to change it back.
The way to turn off your phone with it enabled is either by pressing the power button in the quick access panel, or holding the volume down and power button at the same time.

[CEParsons]

By default, you must long press the side key and Volume down button simultaneously to activate the power menu.