Don’t know why it matters in the long run.
However,
I did read in a history of the Apollo program that Nixon’s speech writers did actually prepare such a speech in case things did go wrong. Obviously it was never delivered. Don’t know if the text got destroyed or filed in the Nixon archives.
To me this sounds a lot like the revisionist crap Apple TV+ is pushing on their streaming service. Anything to destroy our true history and elevate anti-American propaganda!