Hmm. When I use "lsblk -f ..." instead of "lsblk -fs ..." then I also get no filesystems info. Why did you change "-fs" into "-f" ?
Alternatively I could use "lsblk --fs -p -r -o NAME,FSTYPE,MOUNTPOINT". Both variants show me (some lines deleted):
NAME FSTYPE MOUNTPOINT
/dev/sda1 ntfs
/dev/sda2 vfat /media/D
/dev/sda9 vfat /media/X
/dev/sdd1 ntfs /media/hg6/Verbatim_HD