Who would need to press the power button to actually turn off or restart the device, right?
The setting to change this is also pretty much buried under Settings -> Special Features -> Gestures.
(Yes, I have no idea why the Assistant is in German when the phone is set to English either 🫠)
If Samsung, install Good Lock and use the Navstar plugin to bring the functionality back.
That’s what I did.
This is so cool. You showed me a whole new world