I am actually amazed by this announcement. Governments lie all the time, and it would have been to NATO’s advantage to blame the explosion on Russia.
Perhaps the German investigators didn’t get the memo in time.
If you search YouTube you will find videos of Biden and Victoria Nuland repeatedly saying, one way or the other the Nord Stream Pipeline would be ended.
Putin and Russia have both had major energy sanctions placed on them by most of the Western World, blowing up the pipeline would do nothing but reduce Russian revenues while engaging a major war.
Who do you think had the motive to take out the pipeline ??