I got a temporary solution if you want the Documents folder backed up and no manual pause syncing before gaming.
First, move the cache folder into another location, for example I moved cache folder into %localappdata%\Battlefield 2042\cache. Remember that this location must be on the same disk as where the Documents folder is. Remove the cache folder under Documents after moving.
Then, launch cmd and uses mklink to make a directory symbolic link between the cache location in the Documents and the real cache folder
mklink /d "the real cache location" "the cache location in the Documents"
e.g.
mklink /d "C:\Users\NAME\OneDrive\Documents\Battlefield 2042\cache" "C:\Users\NAME\ AppData\Local\Battlefield 2042\cache"
The only problem with your solution is that the game needs this cache for textures. No, the only solution is that EA/DICE put the file where it belongs in %AppData%.
