This property defines the Unicodes which belongs to Sogdian block
Characters like 𐼰,𐼱,𐼲, etc. are listed under Sogdian Block.
43 Characters are present in Sogdian Block starting with the Unicode point U+10F30 that represents the character 𐼰.
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.