lost exfat support ,need v10f or v10h kdz

I have h815, I flashed rooted system.img of eur-v10f and lost exfat support for my sdcard .
tried flashing stock v10f system.img and still the same.
I can flash v10e kdz but I read that it can brick my device ,
so I need eur-v10f or eur-v10h kdz or any other way to restore the exfat support.