I think the Terminator simply ran out of feasible plots and premises. I mean, how many times can you go back in time to kill John or Sarah Connor? The franchise should have stopped at T2 (well, maybe T3, because T3 was almost as good as T2 IMO).
James Cameron is known for having butt-kicking female leads in his movies, so the wokeness doesn't apply here. Just that the franchise simply ran out of gas.
Eliminating John Connor completely and making the new savior of humanity a woman of color is reasonably woke.