Also after re-reading your post multiple times to try and understand it lol, it sounds like you haven’t re-coded your key via vag-com so the immobiliser doesn’t recognise they key if that makes sense lol. It’s early hours and I’m baked so probs not the best time to comment.
I have done all that and the immobilizer still has it. The immobili%erwontlet me talk to the com0uter if that helps.