How to restore new iPhone 14 from backup?

See the following Apple Support article for information on setting up a new iPhone from a backup (or by using Quick Start): Transfer data from your previous iOS or iPadOS device to your new iPhone or iPad - Apple Support

Follow this guidance from Apple→Restore your iOS device from a backup - Apple Support

Hi there,

In order to restore your iPhone from a backup you will need to follow the instructions specified in this link

Restore your iPhone, iPad, or iPod touch from a backup - Apple Support