This property defines the Unicodes which belongs to Ethiopic Extended block
Characters like ⶀ,ⶁ,ⶂ, etc. are listed under Ethiopic Extended Block.
88 Characters are present in Ethiopic Extended Block starting with the Unicode point U+2D80 that represents the character ⶀ.
Currently, as per latest version 15.0.0, Unicode supports 328 number of Block. Here are a few examples - Latin Extended E,Adlam,Aegean Numbers, etc.