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@nicholas__kerns, a third possibility - the one I thought Kaiya was talking about - is the raised glass area surrounding all three of the camera lenses, marked in orange on your picture. I honestly haven't looked into it to any great degree, but I'm pretty sure the only way to replace that square is to swap out the entire midframe, which is a major job; possibly the hardest repair possible on an iPhone that doesn't involve microsoldering.
I wanted to just comment on your post, Nicholas, but there's no way to post a photo from a comment.