I've just sent my second child into reception.
I didn't cry. He was more than ready to go and has been full of beans so as he started (after two weeks of him stressing about it).
I love welcoming new chapters and my older two have settled to school well.
If your child is finding it rough, that's different, and must be so hard.
But growing up is inevitable, and there is always another part of parenting to enjoy.