This property defines the Unicodes which have Old Sogdian script
Characters like 𐼰,𐼱,𐼲, etc. are listed under Old Sogdian Script.
42 Characters are present in Old Sogdian Script starting with the Unicode point U+10F30 that represents the character 𐼰.
Currently, as per latest version 15.0.0, Unicode supports 164 number of Script. Here are a few examples - Adlam,Ahom,Anatolian Hieroglyphs, etc.