The way you've described is how one finds a regular divergence. The chart you've linked shows hidden divergences, as described here: https://www.babypips.com/learn/forex/hidden-divergence
I agree that a valley hasn't yet formed on the RSI to indicate that the move is over, so it remains to be seen if that hidden divergence remains that way or gets wiped out.

Either way, there's definitely a long term uptrend at play :)