Looking at her current routine, it looks like she is doing long am/short pm. So usually with that pattern, the first nap gradually pushes later. This means the second nap also gets later but often then needs to be cut shorter (so even just 15/20 mins, sometimes as short as 10/15 mins) to avoid BT getting too late (as A time is shorter after micro nap)
But if she is settled on current regime and still sleeping well at night, I wouldn't change her routine unless you're getting signs it's time for her e.g. Resisting naps or BT, shorter first nap or EW.
You may already have read this link, but just in case you haven't:
From 2 to 1 nap transition (10-12m and older)