So it seems to be an open issue now. So I guess until this is done I will have to rely on .NET Core API reference and pray I won\'t hit one of the 43 API
As Martin mentioned it in his comment, the .NET API Browser is exactly what I was looking for a while ago.
You can select and filter with the .NET standard API or any Framework implementation and even select any version. That's perfect, Microsoft should have made this earlier.