Hard to say without more context, but waking up at 6 and no nap - that's really long for a 2-year-old. Some kids do drop their nap at that age, yeah, but usually more like 3, 3.5 years old. Two is still pretty early for that. Though of course there are kids who just need less sleep than others, that's genetic.
Have you tried making naptime different? Not necessarily in a dark room with the whole bedtime routine, but maybe a quiet time after eating - a chill period without much stimulation, maybe even lying down for a bit, even if it's just half an hour. Sometimes kids get knocked out of their rhythm and it takes a few days before things "click" again. And yeah, at daycare things can be different because there's a group and a routine, and some kids do better in that kind of structure.
The main thing: watch for signs that she's overtired - if she's still bouncing around on the floor at 7 pm or starts whining for no reason, then she probably still needs that nap. But if she's balanced and can fall asleep normally in the evening, then maybe that's just her normal right now. I wouldn't force it too much, but some kind of quiet rest time at midday is still worth doing, even if she's not actually sleeping.