Basically, is there a way to replicate the pickwhip from After Effects? After I've already created some sort of move on one layer, such as a slow zoom, or a pan, is there a way to apply that to another layer, such as a graphic or maybe a corner-pinned screen replacement? To be clear, I'm not talking about motion tracking, I'm just talking about a movement I've placed on a clip. And I realize I can nest things, but my use case is more of a definite after-the-fact addition of a new element that needs to follow the same created path exactly.
And the further dream would be that if I make any changes on the original layer's motion settings that the linked layer is automatically updated.
(edited to add)
If all files were same dimensions, this would be an easy fix, I'm sure, but let's assume for the sake of this discussion that the original clip that has a scale and movement motion on it is 4k or 6k, and the linked graphic is 1080, or maybe a small logo file that's 500x500 or something nonstandard.