# awk -F\' '/menuentry / {print $2}' /boot/grub/grub.cfg 
Debian GNU/Linux GNU/Linux
Debian GNU/Linux GNU/Linux, with Linux 6.8.12-amd64
Debian GNU/Linux GNU/Linux, with Linux 6.8.12-amd64 (recovery mode)
Debian GNU/Linux GNU/Linux, with Linux 6.6.9-amd64
Debian GNU/Linux GNU/Linux, with Linux 6.6.9-amd64 (recovery mode)
UEFI Firmware Settings