Is \Q ... \E supported in FRegexMatcher?

I’m using FRegexMatcher and I would like to know which features are supported and which are not.

I found the syntax of \Q…\E to find literal strings, but I also found that it is not supported in all libraries: Regex Tutorial - Literal Characters and Special Characters

How do I know which features are in Unreal regex? Does anyone know more about the underlying library?