Asking daycare to change baby during pickup

I just started daycare for the first time with my baby who’s 6 months old.

Two days in a row, when I got to pick her up, I notice her diaper is full or leaking. I asked if I could change her since her supplies are there but the daycare staff said they would change her.

I don’t know norms… is this ok to ask them to change her if she has a full diaper? seems they won’t let me change her in their facility.