Starting with Windows 10 (there is no Windows 11), Microsoft no longer does updates with service packs (or at least they claim they aren’t). They’ve just been pushing updates behind the scenes in a much more rapid and incremental rate.
It’s sort of like Linux where kernel updates and other performance and reliability tweaks are just rolled out as they become available and stable rather than all at once every year or two (the difference being its automatic in Windows 10, manual in Linux).