how to recover photos from icloud

If you had iCloud Photo Library turned on, be aware that iCloud Photo Library is a syncing service. Any photo you delete from a device where iCloud Photo Library is turned on will also be deleted from iCloud and from any other device connected to that iCloud Photo Library. You can recover photos deleted within the last 30 days by going to the Recently Deleted album on the phone. More information on iCloud Photo Library: Set up and use iCloud Photos - Apple Support

Another way that photos may be on iCloud (if you don’t have iCloud Photo Library turned on) is via a backup of an iOS device. You can use the backup to do a full restore (all data on the phone will be replaced with the data from the time of the backup. See: iCloud: Restore or set up iOS devices from an iCloud backup