I think you are bang on the money
If it is in the fascia layer you should be able to feel it, but depending on your physiology, you may not be able to see it
Try TagInfo for iPhone Both your HF NExT-xNT and the TagInfo App are made by NXP, so that is probably your best chance of reading, although the swelling won’t be helping. give it some more time.
The blue cloner comes in different models, they may look the same on the outside, but not necessarily the same on the inside.
As @anon3825968 said, from the factory your NExT - xEM will be in EM mode, you want HID mode so your results are not unexpected with your access panel not responding and the same with
Have you seen this video
