This property defines the Unicodes which have Phags Pa script
Characters like ꡀ,ꡁ,ꡂ, etc. are listed under Phags Pa Script.
56 Characters are present in Phags Pa Script starting with the Unicode point U+A840 that represents the character ꡀ.
Currently, as per latest version 15.0.0, Unicode supports 164 number of Script. Here are a few examples - Adlam,Ahom,Anatolian Hieroglyphs, etc.