My 19mo toddler is going full day childcare soon. Is there anything I should take note of? Should I accompany her whole day on her 1st day?

Each childcare practice different thing I think. Mine first week was half day, and first three days accompanied by us. When we were there we try to sneak away, and he started crying when he couldn't see us. To the point the Teachers called us to come back for him. Then 4th day I let him go childcare half day without company. I spied on him outside and could hear him screaming his head off. But I let the Teachers handle him instead of going to him.