In addition to TV’s Agents of S.H.I.E.L.D., Maria has been in the MCU movies The Avengers, Captain America: The Winter Soldier, Avengers: Age of Ultron, Avengers: Infinity War, and Avengers: Endgame.
Cobie Smulders was only in that one Jack Reacher sequel with Tom Cruise, but as far as we know she’s not done as Maria Hill in the MCU.
She and Nick Fury (Samuel L. Jackson) even had surprise twists for their characters in Spider-Man: Far From Home.