This property defines the Unicodes which belongs to Miscellaneous Mathematical Symbols A block
Characters like ⟀,⟁,⟂, etc. are listed under Miscellaneous Mathematical Symbols A Block.
48 Characters are present in Miscellaneous Mathematical Symbols A Block starting with the Unicode point U+27C0 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.