Position the chat overlay once
Most timelines lose editor time to the same chore: drop the chat overlay onto V2, scale it, drag it into place, repeat for every clip. The timeline maker moves that step into the browser. Each clip with a rendered chat overlay gets a small preview with a draggable rectangle, so you decide where chat sits inside the frame.
That position is written into the project file as the V2 clip transform. When Resolve opens the FCPXML, the overlay is already where you put it.