No pokestop despite of community approved submission

Yes, there are several things in this cell:

Casal de Barri Espai Antoni Miró Peris 41.412925,2.184566 is the Pokestop for it.

It does look eligible to become a Power Spot in the future based on the distance, but we are not exactly certain how those are chosen.

I think you are familiar with this concept from your post, but if not, see: Why an accepted Wayspot may not be used in Pokemon Go (S2 cells and Pokemon Go)