My DD began declining naps about 3 months ago (at the same age as your DD) but then after about 2 weeks she went back to having them.

Nowadays if i say it's naptime she might complain and refuse and such, but if i actually put her in bed she sleeps for 90 minutes solid, so in my view she NEEDS her nap, even if she doesn't particularly want it, kwim? It depends on the kid and the parenting dynamic IMO. There are some days she doesn't want to nap and if i put her down she doesn't nap. But i fully intent to keep a "rest hour" until she's much older, whether she's sleeping or not.

Bx