sorry i am not near my computer. i am on my phone. The root motion option I think is in the Pawn class, details pane. you can use the search bar at the top of the pane to find a checkbox whose name has “root” in it.
Also If you are not using root motion to move the character by the animation’s offset, I recommend NOT moving the character vertically in the imported animation and let the game engine do the jumping by moving the whole actor.