I had to get a replacement phone. While waiting for the new phone to arrive, I used an older iphone 6 that I kept from previous years. Now that is the only backup available to me. I want to restore from the backup from last week. Is this possible?
iPhone XS, iOS 13
If that is the only backup available, there is not much else you can do. Do you have a backup in both iCloud and on your computer?
How to back up your iPhone, iPad, and iPod touch - Apple Support
If so, you might have a more recent backup there.
Locate backups of your iPhone, iPad, and iPod touch - Apple Support
restore from an older backup
