Fixing pressure distortion after battery replacement

By no means am I an expert but from the few screen replacements I have done, personally I do not think that just re-flowing the glue would work.

If you have the machines to perform a glass only repair then I would say that would be your best option to just play it safe and replace the glass itself.

I mean I am a beginner myself and only done a few replacements so I may be wrong & there might be some crazy way around doing it but please let me know if you find a way to do this as I would love to learn myself.

I had that same problem changing the battery of ipad air 2 and it was the following. There is a metal on the back of the rear camera piece and the I passed the plastic to open the screen embedded in the internal lcd and digitizer and the screen stalk was seen with a pressure mark. the other is similar to yours, which was on the side and is embedded glue and internal lcd paper that must be removed carefully and with time. I hope it can help you or someone. At the end of everything the brands were gone and it was like new.