If you mean you created an iCloud backup of your iPhone and you would like to restore that backup, then see "Restore from an iCloud backup" here.
Restore your iPhone, iPad, or iPod touch from a backup - Apple Support
If you mean you created an iCloud backup of your iPhone and you would like to restore that backup, then see "Restore from an iCloud backup" here.
Restore your iPhone, iPad, or iPod touch from a backup - Apple Support
If you mean you created an iCloud backup of your iPhone and you would like to restore that backup, then see "Restore from an iCloud backup" here.
Restore your iPhone, iPad, or iPod touch from a backup - Apple Support
I want to recover my previous data from my iCloud