Due to an unfortunate combination of issues, the Fedora Silverblue, Kinoite and IoT variants that are running a version from 36.20220810.0 and later are no longer able to update to the latest version.
You can use these two commands to work around the bugs:
$ sudo find /boot/efi -exec touch '{}' ';'
$ sudo touch /etc/kernel/cmdline
Afterwards, you can update your system as usual with GNOME Software (on Silverblue) or via:
$ sudo rpm-ostree upgrade
These two issues are rooted in GRUB2 bugs that have only landed in Fedora and do not affect CentOS Stream 9 or RHEL. This also does not affect Fedora CoreOS for different reasons.
You can get more details about those issues in the tracker for Fedora Silverblue: https://github.com/fedora-silverblue/issue-tracker/issues/322