2.5 YO holding for too long

So i started potty training with my 2.5 YO daughter who is extremely strong willed. For the first day, she had no pants on and was offered the potty every 30-45 mins. She peed 2 times the day but both outside on the carpet. Day 2, she held it in for them or ing and went during her nap. in her second wake window, she again went on the carpet. Day 3, she again she held it in for 4+ hours before her nap and 5+ hours in the evening before bed time.

By day 4, she again held it in the morning but she held for 5.5 hours in the evening and finally indicated that she needs to go. So i took her to the potty, she did a few drops in there and she emptied the bladder in the bath. We expected that she got a sense of the pee feeling and will be able to do more of it in the potty on day 5, but again; held it in. When she couldn’t control at all, she finally kept wiggling,touching herself down there, some of the pee came out but she held the rest of it in. We are currently on day 6 and i finally just put pants on her and she peed and pooped both in her pants today despite us offering her enough potty chances.

She can just hold the pee so well and in 6 days, we’ve only had success just one day where she was very full and had to release the pee. What can i do next ? I am barely having any successes.