1) There's a reason why I had doubt of them appearing in A23, it was because of uncertainty.
2) There's a reason for what I said, it's because the Timeline + A23 Release Tracker is obviously missing content, and thus too short (especially for the feature freeze a few months ago)
3) The Aethiopians are more Greek (as a whole) influenced than Egyptian (The Greeks trading with the Aethiopians, having an "Aethiopian" king partake in defending Troy [debatable], etc). I believe you are referring to Herodotus' map? Even then the "placement" of the "Aethiopians" are vague, and is more situated "as south" of Meroe (the Capital of the Kushites) rather than above it, also Classical Greek literature doesn't exactly "refer" to the Kushites as Aethiopians, that's just educated guesses, and ASSumptions, in the realms of Ancient History, nothing is "fact" unless there is a physical object that proves otherwise, the rest is the best of what "it could be"