You can't do for a specific app
Try getting resetprop binary from magisk, push it to /data/local/tmp and execute from adb shell.
BTW, which device model is it?
If you have root access you can try editing UserCustom.ini and locking it with chattr (might adb shell also usable)
I have not tried this way before, but this way the game will not able to write to this file so whatever you set will remain persist.
You are welcome.
I just think you're losing yourself in the tiny details.
Most of the arguments just for testing purpose, that a regular user have nothing to do.
You can check /system/etc/init.sh to review how kernel command line parameters handled.
VULKAN=1 is does not exist anymore, using it does nothing.
FFMPEG_PREFER_C2 does not exist as well as VULKAN=1
GRALLOC4_MINIGBM=1 is correct one.