I was running into an issue on my Ubuntu 22.04 server where the kernel was stuck on 5.15; I never really thought much about it as a long while back ( Many upgrades ago), I remember freezing kernel updates due to some video card issues that I was having with docker.
sudo apt remove initramfs-tools
sudo apt install initramfs-tools
After running those commands, I completed the update to the server with the shiny new 6.5 kernel.