U.S. Undersecretary of State Victoria Nuland: "If Russia invades Ukraine, one way or another, Nord Stream 2 will not move forward." https://twitter.com/StateDept/status/1486818088016355336
In that current favorable climate for anyone whose political goal it is that Germany does not rely on Russian gas I see no strategic value at all in sabotaging Nord Stream 1 or 2.
You don’t need to blow up Nord Stream 2 if the position of the German government and the largest opposition party is to not move forward with Nord Stream 2 anyway. That would only seem to unnecessarily complicate things (and sabotage can only ever really delay things, better to actually also have the political will align with your own).