Some recently installed packages may require a reboot before new can be installed (and the latter are held back), e.g.:
$ sudo apt list --upgradableListing... Donedistro-info-data/jammy-updates,jammy-updates 0.52ubuntu0.2 all [upgradable from: 0.52ubuntu0.1]gnome-shell-common/jammy-updates,jammy-updates 42.5-0ubuntu1 all [upgradable from: 42.4-0ubuntu0.22.04.1]gnome-shell/jammy-updates 42.5-0ubuntu1 amd64 [upgradable from: 42.4-0ubuntu0.22.04.1]grub-efi-amd64-bin/jammy-updates 2.06-2ubuntu10 amd64 [upgradable from: 2.06-2ubuntu7]grub-efi-amd64-signed/jammy-updates 1.182~22.04.1+2.06-2ubuntu10 amd64 [upgradable from: 1.180+2.06-2ubuntu7]