Re: WHO SHOWED UP? Kate was there with Nat and Yelena, and presumably the rest of the extended fam. She brought Emily as her date and introduced her to anyone she didn't know. She helped Sam decorate for the occasion, so presume it's right out of a pretty, autumnal Pinterest board, you're welcome.
Carol was also there with Emme and Kamala! She was still "weak" for the twenty-four-hour period she got hit with the surge magic, but she was over being grumpy about it. Might have had some slightly dumb clumsy moments. Probably recovered just in time to help with Christmas decorating.