Today the Extremes for areas, which you have logged, do show up when you hoover the symbol in profile statistics.
But I think it would be good if you would see the extreme geocache for an area/type when you hoover also for those that you do not qualify. That would mean that it would simplify finding these extremes in a future trip.
I assume the information is available as it is checked if you do qualify, so it is probably easy to add.