This property defines the Unicodes which belongs to Miscellaneous Pictographs block
Characters like 🌀,🌁,🌂, etc. are listed under Miscellaneous Pictographs Block.
768 Characters are present in Miscellaneous Pictographs Block starting with the Unicode point U+1F300 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.