This property defines the Unicodes which are Digits
Characters like ²,³,¹, etc. are listed under Digits Numeric Type.
128 Characters are present in Digits Numeric Type starting with the Unicode point U+00B2 that represents the character ².
Currently, as per latest version 15.0.0, Unicode supports 4 number of Numeric Type. Here are a few examples - Decimal,Digits,None, etc.