"Gen AA" is also known as "Generation Alpha." The oldest/first members of their generation were born around 2010-2012, which would put their oldest members approximately in the 5th or 6th Grades as of today. Obviously, many of their generation haven't been born yet.
We'll find out a lot more info about "Generation AA" as they come-of-age. I reckon that the adjectives of "Alphas" or "NuAlphas" will be used to alternately refer to them...much the way we refer to Gen Y as "Millennials" or how we refer to Gen Z as "Zoomers." The Alphas might even spawn a new, yet-to-be-determined nickname, as they begin to emerge into young adulthood.