Just because Joe Biden explicitly said he wanted to blow it up a year prior, just because there was a US naval vessel right in the immediate area shortly before it occurred, and just because the US has profited immensely from it while also giving Russia the bird does not mean the US did it sweaty
Last I saw they were blaming it on rogue Ukrainian elements (do not ask where they got the equipment, training, or why there was a NATO naval exercise practically right on top of the pipeline).
I expect US will be focusing on trying to start a war with China. The whole point of this war was to try and break Russia before taking on China, now that the war has run its course, US will move on and leave Europe holding the bag.