neowin[.]net/news/windows-10-2022-update-is-now-available-with-a-limited-set-of-productivity-features/
It didn't show up for me in Windows Update, so I went Googling... following a link on Microsoft's blog announcing 22H2 I wound up at this page, which identifies the update as KB5015684 -- none of the other Windows-centric sites I checked gave or linked to that KB number.
support.microsoft[.]com/en-us/topic/kb5015684-featured-update-to-windows-10-version-22h2-by-using-an-enablement-package-09d43632-f438-47b5-985e-d6fd704eee61
That's the same update that was available back in July -- I downloaded & ran it on a whim, and the only difference I've noticed since is the version in Settings shows 22H2.
neowin[.]net/news/here-is-how-you-can-upgrade-to-windows-10-22h2-right-now/
AFAIK no one has published what's new, though I imagine that'll change if/when someone finds anything &/or Microsoft provides some specifics.