Hi there, it's acknowledged that Mounty/FSTAB rely on macOS built-in NTFS driver and it is not full compatible to Microsoft NTFS implementation. Facing this, you'd better use an NTFS for Mac alternative -- iBoysoft NTFS for Mac. This wonderful toolset mounts your NTFS drive in read&write mode automatically, which solves the grayed-out files with ease.
Please feel no hesitate and free download iBoysoft NTFS for Mac right at this moment and then you can read&write your NTFS-formatted drive on your Mac seamlessly!