Only child syndrome?

[Frogsandrabbits]

Perhaps try backing off, not saying her name or talking to her lots - atleast until she gets over her transition. Be present, but not available for her to use as a security blanket. If she comes looking for you to pick her up or gets upset by another kid in her space, try to do a quick redirect with a toy and a "you're okay, go play", then move away.

That was my next step, just wasn't sure if I should! Thx!