I'm afraid I still don't know what you are trying to achieve.
Some time back I suggested trying Grub Customiser to gain some forensic insights
into this confusing world but you asked why? Below answers why.
Attachment 287227
Quote Grub Customiser is a graphical interface to configure the grub2/burg settings
But as I wrote I now prefer to use rEFInd as my loader/gui (in addition to above entries)
on a multi boot desktop.
[P.S] Why do you find it necessary to pose the same questions in different threads?
1. it is not same qustions
2. It was my fault - the other forum question was to complex.
3. Why continue going round and round ?
https://ubuntuforums.org/showthread.php?t=2452655