Metaverse was a flop maybe, but meta makes something like $1 billion a week from its mobile apps, it'd be crazy to say that is not successful.
The fact that it was so successful, and that zuck picked mobile to be the next big thing before many of his peers and against what managers in the company wanted to do is probably what has made him now overconfident that he can do it again
No. Back when smartphones were still in the process of taking over the market, Zuck saw the adoption curve and realized that future ad revenue would be from phone scrollers.
At the time most features were designed and implemented first for desktop and later ported to mobile. He issued an edict to all hands: design and build for mobile first. Not at some point in the future but for everything, starting immediately.
Maybe this doesn't sound major, but for the company it was a turn on a dime, and the pivot was both well informed and highly successful in practice.
By "pivot into mobile" I suspect the other poster is referring to Facebook Home, an ill-fated Android skin and line of smartphones.
https://en.wikipedia.org/wiki/Facebook_Home