Don't worry. Your baby has a pattern and a routine. That is good.
Most babies, nap 2 times a day. Morning and afternoon. When your baby is ready, she will switch to 2 naps. That is fine.
It is important to stick to a routine and nap time. Then when they are older, they will still be a "napper." My son is 25 months old, and he still naps twice a day. If he does not, he gets very very tired and can't even hold his eyes open. That is 'his' pattern. My girl, at 5 almost 6 years old, still naps afterschool too.
There is no "rule" on how many naps, or how long nap should be. Each child is different. Except maybe, a baby will nap at earlier times, and a "child" just in the afternoon.
Even in preschool and Kindergarten, the children still have a nap time.
The reason that daycare or babysitters have children naps (regardless of age) at the same time... is for keeping a "routine" and for needs of organizing the day & the kids. I used to do childcare in my home too... and ALL the children napped at the same time. BUT... as a "Mom"... I let my own children nap when it is "Their" time, and per their needs. I know my child's nap needs at at what time they "naturally" get tired.
If you want, you could try and put your baby down for just 2 naps... but this may not work, or it may mess up her great routine now. So that's the risk you take.....
No real right or wrong answer... but your child seems to sleep great for her age. No worries.
All the best,
Susan