Changing world gravity over time(?)

So I’m doing a scene where I want basically all of the meshes to have 0 gravity at one point and then return to normal. All of this on a sequencer since its not a game what I’m doing. With this in mind I am making a bp actor for every mesh that lets me change gravity to whatever number I want on the sequencer, but, there are too many meshes, and, I really think there is a way to change the gravity of all meshes at the same time on the sequencer somehow. Still, I don’t know how and this is why I am asking here today, does someone know a solution?