Fsck with recovery mode

Hello
Today, to please myself, I decided to boot in recovery mode.
A nice grid of choices is displayed.

I choose the fourth line titled:
fsck check all filesystems

The following warning message is displayed:
Continuing will remount your filesystem / in read/write mode and mount all other filesystems defined in /etc/fstab
Would you like to continue?
Yes No

I choose Yes which is prepositioned and disaster strikes

/lib/recovery/recovery/menu: line 80: /etc/default/rcS: No such file or folder
fsck from util-linux 2.34
/dev/sda20 is mounted
e2fsck; cannot continue, stop immediately.

Done, Please press Enter

I ask you to clarify if the control of this root partition should be done or not and to do the necessary so that despite a crash, the control can continue for all the other partitions described in the fstab file.

I am not sure NTFS formatted partitions are checked. If they are not, the title should probably be changed.
"fsck only check filesystems formatted as EXTn"

Note UBUNTU 20.04.1 and /dev/sda20 is the root partition.
Thank you.