This property defines the Unicodes which belongs to Kana Extended B block
Characters like 𚿰,𚿱,𚿲, etc. are listed under Kana Extended B Block.
16 Characters are present in Kana Extended B Block starting with the Unicode point U+1AFF0 that represents the character 𚿰.
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.