I’m not ready to give up on this haha.
I’m not sure why screen size is gray out, but as long as its more than 0 that should be ok, if anything you should be having the opposite problem, the assets looking too big on the sequencer.
After further digging I uncover another potential solution, go into the Gamemode overrides in movie render queue settings and turn off the “Disable HLOD” and “Use LODZero” and that may fix it