Hard reset not working

If iPad isn’t responding, do one of the following:

• 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 an iPad with Face ID: 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.

If iPad 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.

Because that's now how to do it.

Press and quickly release volume button

Then press and quickly release volume down button

Then Press and hold ONLY the power button (keep holding past the swipe to power off) until you see the Apple Logo, then let go