This property defines the Unicodes which belongs to Ottoman Siyaq Numbers block
Characters like 𞴁,𞴂,𞴃, etc. are listed under Ottoman Siyaq Numbers Block.
63 Characters are present in Ottoman Siyaq Numbers Block starting with the Unicode point U+1ED01 that represents the character 𞴁.
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.