Stupidguy
maybe if you send the drive to a recovery center, its maybe possible there is still some data to be rescued, but i doubt it.
as mentioned earlier, you can try and boot a live distro to see if any fat or ntfs partition is left on the drive, but iirc batocera deletes the entire drive and re-partitions it, before installation, so i doubt that aswell.
unless you had something extremely important on that drive, i would personally just bite the bullet and reinstall the original os.