Hi and welcome to BW
This is a prime time for LOs to move towards dropping the CN, but the transition can take a while and really you'd need her A time to be longer for it to work otherwise you'd be expecting her to do something like a 14.5hr night.
All about the 3-2 transition- 5/6 monthsWhilst I understand your reluctance to move the naps as they are working well, I'm afraid some changes will be inevitable in the longer term. With 2 good 2hr naps you could possibly look at dropping the nap on slightly less than the 3hr A time (which is where you'd be aiming for CN drop). Increasing the first A time could possibly result in a 2hr nap rather than the 1hr 20 she's doing at the moment, even if the nap doesn't increase in length though you'd need the 2 naps spread out more across the day. When you are ready to increase the A I would begin with an extra 15 min and hold it there at least 3 days to settle into it before increasing any more.
You might find that capping the nap could eliminate those NWs if she is UT. Without seeing your full day/night EASY it's hard to know what is usually happening, but if for instance her CN is 40 min then try capping at 30 and see how it goes for a few days.
The other thing to keep in mind at this age is developmental disturbances. If she is trying to learn to roll or sit this can disturb her night sleep and other than giving her as much floor time as possible to practice the skill you would really need to ride it out.
A few things to think about there.
What do you think?