Hiya Hun, to be honest her routine looks good, and less than a 1.5 nap is considered an OT nap, so maybe she is coping okay

To try and figure this out, can you tell me:
Does she seem ready for bed and settle quickly

If not does she seem UT or OT

To help you figure this out, sometimes LO's are quite playful and just don't want to lie down if UT, but lie down and flail around a lot but can't sleep if OT.
Do you think she is high/average/low sleep needs, judging from her sleep history on 2 naps

Can you rule out teething WRT the NW and EW
I'm just trying to figure out the reason for her NW and EW, so I would be a little bit reluctant to suggest pushing her nap our further, at her age, unless she can definitely handle it, otherwise her naps could get shorter.
On the other hand my DS went to 1 nap at 12 months and he would nap 1.5 to 2 hours but sleep 11 hours at night so he was managing well on less sleep than your DD and he is average sleep needs. He used to do a 13 hour day on a 1.5/2 hour nap, so maybe her day is too short

which is why I was wondering about her possibly being UT at BT.
If she is sleeping a 12 hour night consistently and is napping 1.5 hours but is low or average sleep needs then she may be getting all the sleep she needs while clocking up 13.5 hours.
(Hugs)
Vicki.x.