This property defines the Unicodes which serves as a line break opportunity both before and after itself
Characters like —,⸺,⸻, etc. are listed under Break Opportunity Before and After Line Break.
3 Characters are present in Break Opportunity Before and After Line Break starting with the Unicode point U+2014 that represents the character —.
Currently, as per latest version 15.0.0, Unicode supports 43 number of Line Break. Here are a few examples - Alphabetic,Alphabetic or Ideograph,Break After, etc.