Ipad Home Button Touch Id Not Working. Was this answer helpful. And its a real problem.
Several users have reported that their iPad iPhone home button is not working. For most iDevice models especially those older ones we use the Home Button all the time. Some users once reflected that the iPad power button can get normal once they take off the iPad case.
Take down the Home Touch Sensor Assembly and check the home button flex cable.
Unfortunately you wont be able to do it. Although the fact that the Home button stops working or does not work normally is not a common iOS or iPadOS bug it is not completely ruled out either. Make sure that your fingers and the Touch ID sensor are clean and dry For the Touch ID sensor use a clean lint-free cloth to wipe off any dirt or debris. Unfortunately you wont be able to do it.