I think those naps look pretty typical for a 9 mo...one longer , one shorter and around 2hrs total daysleep across both naps. If she's happy still and night sleep ok, I'd stick with it.
ETA sorry just noticed the last 2 days with later BT and trickier pm nap. Could be disruption due to clock change. Let us know how next couple of days go. As Lauren says it could be an early start to 2-1 or there is also a big developmental leap and sleep regression with it at this age. Hold any changes for a few more days and let us know how it's going.