Hmm . . the USA blowing up a pipeline in Danish territorial waters undetected would be quite a feat 🤔
Germany suspended its certification of the pipeline following the invasion of Ukraine. Russia had stopped all deliveries of gas more than three weeks prior to the explosion (it was only filled with gas to maintain pressure). President Biden clearly stated that the USA would oppose Nordstream through sanctions (ie. not by blowing it up). A day before the sabotage a new pipeline between Norway and Poland had opened, further reducing European dependence on Russian gas.
Three separate investigations into the explosion are ongoing, not one of which Russia has cooperated with.