This property defines the Unicodes which are Vowel
Characters like ᥣ,ᥤ,ᥥ, etc. are listed under Vowel Indic Syllabic Category.
30 Characters are present in Vowel Indic Syllabic Category starting with the Unicode point U+1963 that represents the character ᥣ.
Currently, as per latest version 15.0.0, Unicode supports 36 number of Indic Syllabic Category. Here are a few examples - Avagraha,Bindu,Brahmi Joining Number, etc.