I think the issue is elsewhere, since I can’t even connect the joy con physically. The other one does work even when I take out the battery and insert it into the console. This one doesn’t.

Hello I have followed the guide succesfully for the most part, however the joy con doesn’t seem to power up after reconnecting the battery and the anthenna. I even tried swapping the batteries between joy- cons and battery from the right one does work in the left one. The right joy con doesn’t turn on even with the other battery inserted. Any ideas?