@prasket Don't forget that major news/media outlets are slow and bureaucratic. They are slow to change.
They probably have internal processes considering #Fediverse, beginning to research platforms, maybe even doing some preliminary software design work.
They will have to have chains of command, procedures regarding who is allowed to post, how things will be approved, etc.
Legal will have to be involved to weigh in on legal implications of different options.
And on and on.
I"m certain #Fediverse isn't being ignored. It's just a complicated issue from the major outlets' perspective.