Restart Ipad with broken power button
How can I restart my Ipad if the power button is stuck? (Touch ID works, but button will not press.)
iPad Air (5th generation)
It is a common misconception that an iPad (or iPhone) can remain fully functional with damaged or defective physical buttons.
Whilst Accessibility features (such as assistive touch) can be used to augment the User Interface, these features cannot be used as a substitute for physical button sequences that must be used to trigger system recovery actions. Sooner or later, you will encounter a situation from which you cannot recover.
If your iPad has any damaged/unresponsive physical buttons, until repaired, you will not be able to resolve many problems.
If your iPad is in a fitted case, this may be interfering with the button; try removing the case. Otherwise, you will need to investigate repair - which can be arranged via the Genius Bar at your local Apple Store or Apple Authorised Service Provider (AASP):
Genius Bar Reservation and Apple Support Options - Apple
Alternatively, you might consider using Apple’s mail-in repair service: