Give her the vacuum and let her get on with it
(we have one of those small hand held type which DS has used for a loooong time - who needs toy vacuums??)
I just thought the norm was to move the nap later and later until it's dropped?
For some. I've seen LOs go down to a 15 min or so micro nap before dropping altogether. For others though, no way.
Another option is to leave the nap longer and begin the odd no nap day, napping say 13 days out of 14 keeps them tired enough to do the nap, then gradually increase the number of no nap days. This was not our route either though. A single no nap day and he was a danger to himself. I did try it because it's one of the standard routes but it was a real no go.
We had a very steady routine of set nap 2-4pm, BT 8pm for a good while before the transition. When things went off track he was UT at BT so didn't sleep until 8.30 or 8.45, nights ended up getting shorter and shorter, that's when I tried various options such as capping and NNDs - huge mistake for us. It was a tricky period of transition for sure but after some wobbling he eventually went back to 2-4nap and 8pm BT. The one day he had hand, foot and mouth, very poorly, slept a 2.5hr nap because I couldn't bare to wake him when he was so ill. He never napped again! That was it, dropped cold turkey over night. Yeah the odd micro nap in the car (even now but rare), and after 2 weeks he was pretty OT and slept a 2 hr nap in my bed with me (unheard of!), but as far as routine went he just dropped the nap from 2 hours to zero. I know there are a few other LOs here have done the same.
It really does depend on the LO.
It sounds like she's maybe looking for a bit more sleep somewhere, how about trying a one off lie in at the weekend if you don't need her up for anything? if she's regularly woken in the morning and from nap too she doesn't really have a place she can catch up if needed (to self regulate), she may just need a bit more sleep due to teeth or developmental leap rather than as standard in her routine.