I'm not sure if F#'s implementation is good enough. The specification [1] suggests that it doesn't do any additional normalization to the resulting identifier, so otherewise identical identifiers with a single space, a single tab and two spaces would be different. I would expect them to collapse into a single space character.
Mostly because it's rare to see identifiers with whitespace allowed after all. So this has to fulfill some specific needs.
The main use case here seems like self-describing properties that will be hardly referenced elsewhere. In principle this doesn't really need any new syntax, as you can put the description into the attribute (`[<Property>]` here) and the name itself can remain arbitrary or even be made anonymous. But we've got textual identifiers instead. So I guess that some code does refer to those textual identifiers, and if that's the case, being able to ignore invisible differences when comparing textual identifiers looks like a good idea as well.
[1] https://fsharp.org/specs/language-spec/4.1/FSharpSpec-4.1-la...