There is definetly more to the story of the rock saying that, him and Kevin Feige discussed him to joining Marvel Studio in MCU. Some reports are stated that the Rock was visiting the set of Black Panther: Wakand Forever frequently and meeting with cast, crew and Kevin Feige. This offocourse due to the fact that two films Wakand Forever and Black Adam were shooting at the same time right next to one another.
Black Panther: Wakanda Forever started shooting and continued its first treck of shooting in atlanta, it was literally next to door to them wrapping the final few weeks of Black Adam. According to some reports Rock was frequently on his free time visiting Black Panther set.
Now we don't know anything, but some sources are speculating that maybe his debut in the MCU could be happening in Wakanda Forever.