That's a crap headline:

Republicans react after Gavin Newsom says he 'didn't even know' about the 5,000-bottle wine cellar in his $7.5M home: 'The lies keep coming'

He's not saying he's unaware of the existence of the wine cellar, he's saying he didn't know that it held 5,000 bottles specifically. It seems quite possible someone wouldn't know that, and also I'm not sure why anybody should care in the first place.

At a press conference this week, Newsom was asked if he used the wine cellar to its full capacity, to which he responded, "Are you serious? Really? No, I never filled it. I didn't even know I had that much."