Also, the advent of any beta has been reliably announced in this very group by NVAccess staff for a very long time now, and typically on the first day it's available.
A direct download link is also generally provided as well.
Brian - Windows 10 Pro, 64-Bit, Version 2004, Build 19041
If you think that you can think about a thing, inextricably attached to something else, without thinking of the thing it is attached to, then you have a legal mind.
~ Thomas Reed Powell