Isolating a person in a photo to send in messages

Re: I want to try to isolate one figure in a photo on my iPhone to save/send

Seems you could "crop" the photo (likely crop twice) to leave that one figure

How to: Edit photos and videos on iPhone – Apple Support

or

If there are not many other people in the photo you may be able to:

Lift a subject from the photo background on iPhone – Apple Support