Child lock / Screen lock

Searched everywhere in the guides / plugins / community request but could not found any results.

Would be great to have a screen lock feature (with a pin or something). - i am trying to avoid my 3y old tech loving son to turning on / off the AC all the time, and starting the robot vacuum. :)

Idea:

In the top bar adding a lock button (next to clock / wifi signal) for quick screen lock feature. Once it is locked whenever somebody tapping it a pin request pops up after correct password / pin it will unlock the screen. Screen timeout automatically locks the screen too

Thank you