Potty training and going to preschool

I started potty training my girl 4 days ago. She was doing pretty well. Just 1 accident a day.

Today she went to school and had 2 accidents in 3 hours.

It's this normal? I was wondering if she didn't want to stop to use the potty while she was busy doing activities.

Teacher told me they took her twice, but she didn't go.

She's 2yo.

Any relatable experiences?