How do you recover my delete photo

As Mac Jim ID says, if you deleted pictures from Recently Deleted, then they are gone. You can see this:

        If you're missing photos or videos in the Photos app

Basically the above says to look in Recently Deleted and in Hidden. Be sure to check your Library thoroughly. You can use the search field with the date or location—the pictures may not be where you expect, as dates may have changed. And remember, you can sort the Library by date captured or by date added. Also, your Library view now has filters, and you may not have your filter set to "All Items.”

If you don't use iCloud Photos, but you have Settings>Apple ID>iCloud Backup turned on, then you may be able to recover data. You should look here:

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

“Restore” is what you do when you buy a new phone, so this safety, if you have it set, requires you to erase everything on your phone and replace it with the backup. You would have to get to the backup quickly, usually within a day, before the backup is replaced by a newer one. However, if you did have iCloud Photos enabled, then the iCloud Backup wouldn't keep an extra copy.

Perhaps you have shared your pictures with friends-- then you could get them to send copies back to you.

Unfortunately, if you don't keep your own backups to an external drive, then there really isn't any place else to look. To back up your pictures you can just plug in an external drive, select the pictures, and use Share>Save to Files. Alternatively, you can backup to a computer:

Transfer photos and videos from your iPhone or iPad to your Mac or PC

If you haven't done one of those backups, then your remaining pictures continue to be in peril. 

When did you delete it?

The Recently deleted album will keep your photos for 30 days in case you change your mind. If you delete the photo from that album before that time, then it is permanently delete immediately.

If it has been longer than 30 days or it was deleted from the Recently Deleted Album before that time, then you would need to look elsewhere, such as if you saved them to a computer.