This property defines the Unicodes which belongs to Egyptian Hieroglyphs block
Characters like 𓀀,𓀁,𓀂, etc. are listed under Egyptian Hieroglyphs Block.
1072 Characters are present in Egyptian Hieroglyphs Block starting with the Unicode point U+13000 that represents the character 𓀀.
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.