This property defines the Unicodes which belongs to Sundanese Supplement block
Characters like ᳀,᳁,᳂, etc. are listed under Sundanese Supplement Block.
9 Characters are present in Sundanese Supplement Block starting with the Unicode point U+1CC0 that represents the character ᳀.
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.