Sounds to me like she's perhaps overthinking the whole thing. She posted an, um, "interesting" photo of herself on social media and he made (perhaps an ill attempt at) a joke. Regardless, this incident she's speaking of occurred in January of 2021, so 3 years ago now and Cuomo himself departed CNN later that year so I'm not sure there's really any benefit to anyone of her bringing this up now. If she really felt his comments were out of line coming from a working colleague, she could have simply told him that back when it first occurred, or had that message communicated to him via HR.
I'm often intrigued, and sometimes suspicious of folks who won't simply go and talk to someone about something that bothers them, yet they'll gladly spill that story in front of a whole host of listeners/viewers/readers on a podcast, an interview or a tell-all book. Sometimes makes you wonder if they're just doing so in order to try and generate more $$ on sales of their podcast/book, or to get their name in the headlines - or settle an old score in a somewhat cowardly manner.