My iOS 15.2 has downloaded but it’s not installing

Click on a link below for full instructions about how to update with wi-fi or 5G (if using 5g then see: Use 5G with your iPhone https://support.apple.com/HT211828 ), or using a computer if you cannot use wi-fi or have storage issues.

Update your iPhone, iPad, or iPod touch. Click here --> https://support.apple.com/HT204204

Or this video:

"How to update your iPhone or iPad" click here --> https://youtu.be/csJAEyvvruY

Update software on iPhone, iPad, or iPod touch in iTunes on PC --> https://support.apple.com/guide/itunes/update-device-software-itns3235/windows