That is a good question.
My friends have a group where we just talk to each other, either at recess or while we're working. We try to be inclusive in our class. I love my class that way. If somebody wants to use preferred pronouns, they will. It's just that they won't tell the teacher about it, because it's important for a child to feel safe among their friends—anywhere, really. Since that has been taken away, it's especially important.