This property defines the Unicodes which have Avestan script
Characters like 𐬀,𐬁,𐬂, etc. are listed under Avestan Script.
61 Characters are present in Avestan Script starting with the Unicode point U+10B00 that represents the character 𐬀.
Currently, as per latest version 15.0.0, Unicode supports 164 number of Script. Here are a few examples - Adlam,Ahom,Anatolian Hieroglyphs, etc.