Our daycare had a few cases but none of the kids got sick. Two out of two teachers in one room and one teacher in another but zero kids. One teacher had a cold basically but the other two never would have known they were sick.
Again, the kids were perfectly safe even while being cared for by someone with active, symptomatic COVID. We know what we are dealing with now, and we know kids are at significantly less risk of a symptomatic infection let alone a significant one. There is no reason to delay anymore.