This property defines the Unicodes which are used for positions after non-spacing marks or control characters
Characters like ̀,́,̂, etc. are listed under Extend Word Break.
2554 Characters are present in Extend Word Break starting with the Unicode point U+0300 that represents the character ̀.
Currently, as per latest version 15.0.0, Unicode supports 19 number of Word Break. Here are a few examples - Carriage Return,Double Quote,Exclamation, etc.