Freezing-stuck problem

Perhaps something went wrong during the latest update, or your iPhone or iCloud available storage is very limited (check them going to Settings>General>iPhone Storage and Settings>[your name]>iCloud).

If both available storages are okay (at least 10% of the total capacity is free), I'd suggest that you install a fresh copy of latest iOS version.

To do that, make a full backup of your iPhone, then restore it to factory settings and, in the end, set it up as new, following these instructions:--> Restore your iPhone, iPad, or iPod to factory settings – Apple Support

When done, test your iPhone without restoring data from the backup. It it works fine, you can exclude a hardware failure, and you can restore data from your previously made backup.

Regards

Giulio

Follow the steps provided in this support guide:--> If your iPhone, iPad, or iPod touch won't turn on or is frozen - Apple Support

Regards

Giulio