This property defines the Unicodes which belongs to Arabic Supplement block
Characters like ݐ,ݑ,ݒ, etc. are listed under Arabic Supplement Block.
48 Characters are present in Arabic Supplement Block starting with the Unicode point U+0750 that represents the character ݐ.
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.