Drives in gparted differ from entry in /etc/fstab

{Note: I have brain-damage due to a stroke in 2011}

I have four drives, 2 backup drives and to "system" drives

The drive designation in my fstab file, for example, contains:

/dev/sda1 for my /boot/efi directory,
/dev/sda2 for my / directory,
/dev/sda3 for my /home directory, and
/dev/sda4 for my /VDO directory

BUT, in gparted /dev/sda is an unpartitioned drive
{in gparted the /dev/sdb drive is my system directory}
{{In /etc/fstab /dev/sdd is my unpartitioned drive}}

This seems unusual to me. It seems that EVERY entry in gparted differs from EVERYTHING in my /etc/fstab file.

Simple question:

WHY??????
Is gparted inherently broke in this manner?

I trust my /etc/fstab file, why is gparted doing this to me?????

Thank you for reading this question, if you have any insight into this question, I would appreciate any response.

Thank you for your time, and have a good day!