I just wandered over to the Insiders site and it seems 21H1 will be delivered the same way 20H2 was delivered, through the normal updating process. I did not see any mention of Wi-Fi 6e in the article.
If the initial series of updates do not have that, maybe the next one they are releasing to the Beta Channel seekers will have more but I don't see anything listing those changes..
I will assume, anyone that already has the AXE11000 and the AX210, just doesn't have any indication the 6 GHz radio is yet active..
Maximus Z790 Hero,
Intel i9-13900k
Intel BE200