Re: Frame Stuttering Issue
Have you tried the following :
Enable game mode on Windows.
Disable In-Game Overlays.
Update your graphics driver.
Enable hardware-accelerated GPU scheduling.
Verify the integrity of game files (for Steam users).
Clear the cache for the game.
Change in-game settings.
These articles may be worth reading and point you in the right direction.
https://www.thewindowsclub.com/battlefield-2042-fps-drops-and-stuttering-issues
https://answers.ea.com/t5/Technical-Issues/Cache-folder-stuttering/m-p/11550370
Hope you get it sorted.