Not updating

Update isn’t getting download stuck at loading

Guess it is not stuck at loading, you need to be patience.

Try to update using a pc or Mac.

If you have a pc, see this Apple article: Update software on iPhone, iPad or iPod touch in iTunes on PC

https://support.apple.com/en-gb/guide/itunes/itns3235/windows

If you have a Mac, see this Apple article: Update your iPhone, iPad, or iPod touch with the Finder

https://support.apple.com/en-us/HT212185