“How America took out the Nord Stream pipeline”

The fact that Germany, Sweden, and Denmark, the countries investigating the explosions, are refusing to point any fingers at Russia suggests to me that they have serious reasons to believe that it may have been an ally nation that destroyed the pipeline. Pointing the finger at the USA, even if they had very concrete evidence, would be a massive diplomatic problem - so it stands to reason that we would not hear about it. By contrast, especially in the context of the war, pointing the finger at Russia would not particularly affect diplomatic ties - especially given how Russia has already been pointing the finger at everyone else.

So, even though this report itself is rather thin on evidence, it is presenting a version of what seems to be the most plausible hypothesis.