I think GP gave a cynical, but fairly accurate summary. If F# is worked on by MS research, they certainly didn't communicate that in the strategy they just published.
C#
>We will keep evolving C# to meet the changing needs of developers and remain a state-of-the-art programming language. We will innovate eagerly and broadly in collaboration with the teams responsible for .NET libraries, developer tools, and workload support, while being careful to stay within the spirit of the language.
F#
> We will drive F# evolution and support the F# ecosystem with language leadership and governance. We will encourage community contributions to improve the F# language and developer experience.
Yeah, it is strange that they did not mention that part of F# directly, only obliquely in saying that they maintain compilers and toolchains and runtimes with extensive community support, or something similar, perhaps on the linked page.
C#
>We will keep evolving C# to meet the changing needs of developers and remain a state-of-the-art programming language. We will innovate eagerly and broadly in collaboration with the teams responsible for .NET libraries, developer tools, and workload support, while being careful to stay within the spirit of the language.
F#
> We will drive F# evolution and support the F# ecosystem with language leadership and governance. We will encourage community contributions to improve the F# language and developer experience.