Trisquel_10 skips the grub menu

After years of struggles getting Trisquel to boot up without getting "grub rescue" instead,
now I've eliminated all but a sole instance of Trisquel_10 from my Thinkpad T430. Boots up
nice and quickly, but without pausing at the grub menu. What has changed ?

Memtest86+ is installed, and there are other Trisquel images like what I remember seeing in
days past:
sudo update-grub
Sourcing file `/etc/default/grub'
Sourcing file `/etc/default/grub.d/init-select.cfg'
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-5.4.0-122-generic
Found initrd image: /boot/initrd.img-5.4.0-122-generic
Found linux image: /boot/vmlinuz-5.4.0-113-generic
Found initrd image: /boot/initrd.img-5.4.0-113-generic
Found memtest86+ image: /boot/memtest86+.elf
Found memtest86+ image: /boot/memtest86+.bin
done
After long ignoring dire warnings about skipping the creation of a UEFI partition, I followed
the Install menu (Something Else) and added such a partition; see attached screen grab.
It happens that this 2nd-hand 'puter had come with Windoze_10 installed, but that predatory
OS had already grabbed control of all the USB ports that weren't already in use. After
solving that issue, on a later bootup to access a local gov'mint website's GIS data, Windoze
took upon itself to do a "Disc C: cleanup" and again took possession of the unused USB ports,
and so I had to get rid it by reformatting the entire /dev/sda hard drive, concurrently
creating that UEFI partition.
Now during boot-up, Trisquel skips the grub menu altogther, jumping directly to the login
screen. The BIOS is set for legacy mode only; I just now changed the boot order from Legacy
First to Legacy Only with no effect.