'df' doesn't show all duplicate mounts

Issue

• Expecting to see multiple entries for same NFS/CIFS share for different mounts while running df -h.
• At boot all get mounted, but only few shows up in the output provided by df.
  The mount command provides information for all NFS mounts.
  If I manually umount it and then mount it again it will also show up in df.
• The same share is mounted on different multiple mount points., however, df command is displaying only a few of the NFS/CIFS filesystem.
• All the CIFS shares are not displaying in df -h command.