At 12 months, if she was in child care, she'd be down to one long nap per day.
The toddler room schedule for naps, they eat lunch around 11-11:30 then get cleaned up. After that they go down for their naps. Most of them are awake by 2:30 but some sleep longer and have to be woken up ab 3 so they can go outside for their outdoor playtime.
If you'll just give it some time she might go back to her regular sleep schedule but it's unlikely. She's growing and doesn't need as much sleep now. She's also probably starting some separation anxiety. I'd stay with her until she's asleep so you can at least get some rest before she wakes up again.
Our kids all went to sleep for the night around 9pm. That time worked really well for them. They always feel asleep coming home from child care but that was just for a few minutes. Then they played all evening and were ready to go down at 9. They got up around 7 or 7:30 if they had to, on the weekends they woke up by 9.