This property defines the Unicodes which have Devanagari script
Characters like ऀ,ँ,ं, etc. are listed under Devanagari Script.
164 Characters are present in Devanagari Script starting with the Unicode point U+0900 that represents the character ऀ.
Currently, as per latest version 15.0.0, Unicode supports 164 number of Script. Here are a few examples - Adlam,Ahom,Anatolian Hieroglyphs, etc.