I cannot shut down or unlock my ipad

If iPad isn’t responding, do one of the following, you should start with a forced-restart of the iPad:

• On an iPad with a Home button: Press and hold the top button and the Home button at the same time. When the Apple logo appears, release both buttons.
• On other iPad models: Press and quickly release the volume up button, press and quickly release the volume down button, then press and hold the top button. When the Apple logo appears, release the button.
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Note: If iPad still doesn’t turn on, or if it gets stuck during start up, see the Apple Support article If your iPhone, iPad, or iPod touch won’t turn on or is frozen.

have you read

If your iPhone, iPad, or iPod touch won't turn on or is frozen - Apple Support

My iPhone screen is locked, I cannot suppress the icons.

I get emergency button SOS and medical only on the screen.