There is no one flag that represents all Aboriginals at this point. Recently there are some well designed flags representing villages.
The most well known is the E’dulan (Dulan, Taidong) flag because Suming, a well known singer, keeps promoting it.
It’s a very beautiful design. The problem of it is the color on color design of the Amis star and the blue background. If they add a metal color to make the black star pop, it’d be much better looking.