My granddaughter Hanah is 16 months old now, and at daycare she has been promoted out of the baby room. She is in with the toddlers now. The toddlers get to sleep in cots on the floor (about one inch off the floor, but still, cots), and, an even bigger privilege, in the toddler room they do not take a morning nap.
So, overnight, Hanah has stopped taking a morning nap at daycare.
But physically she is still “in between”. Sometimes she needs a morning nap, and sometimes she doesn’t.