Hi,
Grub change with the last up date, have a look here, more details…
There’s a line to add at the beginning of /etc/default/grub, bottom of the first option block :
GRUB_DISABLE_OS_PROBER=false
__
I had the same issue and could resolve it by manually adding
the line GRUB_DISABLE_OS_PROBER=false
to /etc/default/grub.