This property defines the Unicodes which are of Left Joining Type
Characters like ꡲ,𐫍,𐫗, etc. are listed under Left Joining Joining Type.
5 Characters are present in Left Joining Joining Type starting with the Unicode point U+A872 that represents the character ꡲ.
Currently, as per latest version 15.0.0, Unicode supports 6 number of Joining Type. Here are a few examples - Dual Joining,Join Causing,Left Joining, etc.