The only anchor in reality appears to be Biden suggesting that they knew how to take it out which seems like a pretty weak place to build a large story.
What I find particularly odd is that this entire thing appears to be based on a single, unnamed source "with direct knowledge of the operational planning".
Why is that weird? Assuming this is true, there would be rather many people with such knowledge. One of them may feel the need to talk. Would you expect such a source to be named?
Also, I find it a lot easier to imagine why the US would want to do this, than why Russia or Germany would want to do this.
Or, since the pipelines are well known and not difficult to reach, basically everyone with access to explosives, a boat a divers with explosives skills. None of which is particularly hard to come by.
I can see the US doing it as they've been vocal opponents to nordstream since its inception, I can see Ukraine wanting to do it although I doubt they'd have the resources, might also have been some other rogue European faction wanting out from under Putin's thumb.
Destroying the pipelines removed the potential reward for an internal rival to replace him.
Putin's rivals make Putin look soft. If they do take power, they will end the conflict quickly and definitively.
Heck leveling Kiev will do that too. Could be done in a day.