2.5 yr old sleep schedule


I need help. my daughter has had the same bedtime routine all her life for starters. bath around 8:30, lotion, jammies, a book 2 lullabies, turn on her sound spa and in her bed by 9p. I worked a 7a-3p job and she would have to get up between 545 and 6 to go to daycare. I recently switched jobs and I don't need to wake her until 745 and for the first week it was fine no issues but now she wakes up on her own between 530 and 6... she takes at least an hour nap after lunch. she normally sticks to a routine pretty well she does best with routine but not for the last week and I can't think of a change between when she would sleep till 745 and to when she wouldn't. please help!