I am guessing it comes out today. Windows 10 21H2 is expected to come out in a couple of hours, and LTSC will likely come alongside it after the IoT event.
As mentioned, Microsoft did well on keeping any leaks on this under wraps.. no fun in all that though when there has been high anticipation for this release.
Now that's just agonizing. At least we finaly got releases for regular enterprise. Debloat tools and update disabler here I come...