In Lightroom you can create a virtual copy. This will be an exact copy of the original image. You can crop the original image and the virtual copy to your liking, and then export copies when you are finished.
Create a virtual copy, so that you have two versions of the file.
Then crop the original to photo 1 and the other to photo 2.
You can now export them as two separate photos,
A work around is to make 2 virtual copies then crop each virtual copy to show the old and the new person then export each of them to a new JPG.
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