You broke the lcd. You can get this repaired via a new LCD/Glass. It’s not easy for a beginner but my shop charges $69.99 for it so it’s not crazy expensive to have a profesional do it. Try a soft reset first holding the power and home button together for 10 Seconds.

I just used an OEM refurb 5/6th gen screen on one and it works perfectly. Not sure if aftermarket is the same.

iPad Mini Checklist, POWER OFF that device No metal tools Remove the long pads on the bottom of the LCD Move tape from old screen to new screen (near the home button flex, or use a non conductive tape to cover all the exposed circuits) If its pre-assembled and the power button is not working, its either a bad solder or bad IC Chip (you can try retouching the solder, but if its under warranty I wouldn't mess with it unless its a last resort) Mini's give me a different problem everytime.