In after effects you can set the keyframe interpolation to 'hold'.
That makes the animated object not move until it gets to the keyframe (eg. you animate the position of an object and instead of "travelling" between keyframes it jumps to the second position when it gets to the second keyframe)
Is there anything like that in Fusion, I can't seem to find anything?
For some reason, when I was testing it, it was still moving and then jumping, but after trying it again it just jumps over to the new position. Most likely an error on my part, thanks!