10 month sleep regression...not sure how to handle it

So my baby has been sleeping through the night since she was about 4-5 months old. Sometimes she would cry/fuss but only for a maximum of 3 minutes or so. All of a sudden at 10.5 months she is waking once in the night and will not go back to sleep. I let her go for a bit to see if she will go back to sleep on her own but she will just stand at the corner of the crib fussing and yelling for us.

When I go in I check her diaper and try to offer a bottle, but she won’t take it. She pushes on me and insists to get down because she wants to play. It takes 2-3 hours to get her to go back to sleep.

It’s killing me. It can’t be good for her to be awake for that much time in the middle of the night. She’s more fussy during the day because of the loss of sleep.

I don’t know what to do!! We tried CIO for a week but she is persistent and will not go to sleep.