This property defines the Unicodes which belongs to Phaistos block
Characters like 𐇐,𐇑,𐇒, etc. are listed under Phaistos Block.
47 Characters are present in Phaistos Block starting with the Unicode point U+101D0 that represents the character 𐇐.
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.