Both my DDs have always been good with words/vocab. One was an early talker/late walker. The other was the opposite. They both ended up the same by the time they started school.
Both still wordy in their own ways but neither outstanding academically.
Me and DH are both wordy but not really bright. We did the bedtime reading etc but not so much of the babytalk and I think that might be a factor.
About liking adults more than peers, I think it’s quite common with only children, at least by what I have seen with my nephew and niece and DDs peers. But don’t overthink that, because by y6/y7 school friends are far more important than parents.
It sounds like you have an inkling that there may be neuro-divergence. And there may/not be, but you do need to give it a little bit more time.
At 3, I would try and get as much time playing with others at your house or the park (you might have to be v hands on). It won’t always end well. DD2 was shocking at sharing/playing but is now the opposite.
But don’t worry too much, she will be what she will be. Introvert/extrovert, neuro typical/divergent. Sporty/academic.
Focus on resilience, kindness, humour, good manners. All those things are so much more important in the long run.