So I had Ubuntu 20.04 installed on my PC. Then I installed Kubuntu 20.04 alongside my Ubuntu. But after reboot the GRUB menu was not updated at all. It's like Kubuntu installation did not update my GRUB menu. I am using UEFI so maybe that is the problem? How do I add Kubuntu menu option to my GRUB now?
P.S. I tried Grub Customizer, but that did nothing.