Are you having trouble remembering? Almost a year ago we went over the exact same thing.
We had an entire thread about that on this very website, in which you basically admitted that the theorem does not imply what you want it to.
You mean a universe with a first moment of time. That is the sense in which they are saying the universe had a beginning. Not that there was ever nothing in existence. Do you understand the difference?
No, Vilenkin has an argument for a first moment of time. Nothing he says entails that at some point the universe did not exist. And if Vilenkin has an argument for the universe having come into existence from nothing, then please present that argument. The BGV theorem says no such thing.
Do you understand the difference between arguing that, and just claiming it with no supporting argument? You’re doing the latter.