my iphone 12pro max showing that your data is ready to be moved to your new iphone. this icloud backup will be deleted in 20 days
i have updated my phone based on IOS 16.6.1
iPhone 12 Pro Max, iOS 16
Question marked as
How to create a temporary backup of your current iPhone or iPad · Go to Settings > General. · Scroll down and tap Transfer or Reset [Device].
Get temporary iCloud storage when you buy a new iPhone ...
How much time you have to restore your temporary backup
You have 21 days to restore your temporary backup to your new iPhone or iPad before your temporary iCloud storage expires and your backup is permanently deleted.
Do not erase your current iPhone or iPad until you restore your temporary backup to your new device.
If your new iPhone or iPad doesn’t arrive within 21 days, you can get an additional 21 days to restore your temporary backup before it’s deleted. On your current iPhone or iPad, open Settings and tap Keep My Backup Longer.
To request additional time to restore your temporary backup before it's deleted, contact Apple Support.