My iPhone 12 mini will not charge

The information that you are looking for exists in this article that you were reviewing earlier 👉 If your iPhone or iPod touch won't charge

Try and Force Restart your iPhone EXACTLY as shown below and see whether that resolves the issue:

• Press and quickly release Volume UP button
• Press and quickly release Volume DOWN button
• Press and Hold the SIDE button until an Apple logo appears and then release the Side button (Can take up to 20 seconds. (DO NOT release Side Button when invited to Slide Power OFF). 

Axel F.

Did you already force restart the iPhone?

To force restart iPhone X, iPhone XS, iPhone XR, iPhone 11, iPhone 12, or iPhone 13, do the following:

Press and quickly release the volume up button, press and quickly release the volume down button, then press and hold the side button. When the Apple logo appears, release the button.

copied from: Force restart iPhone - Apple Support

Also, if you haven't already, try these tips:

If your iPhone or iPod touch won't charge - Apple Support