How do I back up my iPhone
How do I backup my iPhone on iTunes?
iPhone 8 Plus, iOS 15
How do I backup my iPhone on iTunes?
iPhone 8 Plus, iOS 15
If you have a Mac: How to back up your iPhone, iPad, and iPod touch with your Mac - Apple Support
If you have a Windows PC: How to back up your iPhone, iPad, or iPod touch with iTunes on your PC - Apple Support
If you have a Mac: How to back up your iPhone, iPad, and iPod touch with your Mac - Apple Support
If you have a Windows PC: How to back up your iPhone, iPad, or iPod touch with iTunes on your PC - Apple Support
Ok found it.
How do I back up my iPhone