Potty training and holding pee

My daughter is a little over two and showed all the signs of being ready to potty train. The first few days went as expected. Lots of accidents but she seemed to understand the concept. Now about 5 days in, she is just holding it. Yesterday she only peed during her nap in her diaper. All day! She does to daycare and her teacher took her every 30 minutes to sit in the potty. She sits on it every time but doesn’t go. She is acting completely normal, eating a drink the same if not more than usual. I don’t think she is waiting for a diaper because I put one on her before bed and then we did our bedtime routine and 20 minutes later it was still dry. Has anyone else experienced this? Guess she will figure it out and have to go eventually??