Natural gas power plants are gas turbines, not steam turbines.

Some have a secondary steam turbine as an exhaust energy recovery system but as I understand it that’s becoming uncommon on new builds because new gas turbines are expected to be used less now that there’s a lot of renewable energy on a lot of grids.

If I remember correctly, most natural gas is used in combined cycle turbines. Kind of like hooking up a turbine from an aircraft directly to a generator. Then the excess heat from that turbine is used to generate steam for another turbine.