It's revealed that Billy has the ability to split his powers amongst his family, which include Mary, Freddy, Tawny and the other kids. When the powers are split, it's implied that each gets one of Shazam's powers, although it's not spelled out.
Uhhh, Mary and Freddy had them all. They could all fly too. Pedro had strength and Dara had speed, but really, I don't think they did that. If so, that was really dumb not to mention, why did the whites get the full set and the rest did not? I think they had them all, but focused on instinct. That and like in Power of Shazam, the power is limited and shared. With Black Adam gone, the power is increased to them all.