List all kernels
grep 'menuentry \|submenu ' /boot/grub/grub.cfg | cut -f2 -d "'"
Edit default grub
nano /etc/default/grub
Update GRUP_DEFAULT=0 line
GRUB_DEFAULT="Advanced options for Ubuntu>Ubuntu, with Linux 6.5.0-41-generic"
Then update grub
sudo update-grub
Reboot
reboot