I don't know. I'm inclined to think lamination flaw. If it was PMD, where is the shifted material? Can you post a picture of the reverse? You could gentle try poking the rightmost edge of the area to see if it's a flake.
Not that thete isn't some damage here but for the most part this appears to be a lamination issue. There are striations that are basically perpendicular to the line of missing metal in the area thst is missing. This is an indicator for lams. The area on the right is a retained lam
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