How do I back up
How do I back my phone up to a new one
iPhone 11, iOS 14
To backup.
Back up your iPhone, iPad, and iPod touch.
Back up – What does iCloud back up
To transfer your content to a new phone.
Transfer content from an iPhone, iPad, or iPod touch to a new device.
Quick Start to transfer data from your previous iOS device to your new iPhone, iPad, or iPod touch.
Set up your iPhone, iPad, or iPod touch - Apple Support
Use iCloud to transfer data from your previous iOS device to your new iPhone, iPad, or iPod touch