Considering how many false flags operations Putin has ordered himself, ongoing LPR/DPR referenda, or the fact US provided intelligence of a possible attacks on the pipeline to German intelligence back in July. I don't see why people are pushing the "US did it" narrative.
https://www.reuters.com/world/cia-wa...el-2022-09-27/
My money is on Russia using this as domestic motivation to drum up war support. Just a day ago there was suddenly a gunman wearing "Nazi" shirt attack on a Russian school and blowing up a now useless pipeline wouldn't be the top ten worse things Putin has ordered.