Biden said this on February 7th. On the 22nd the German Chancellor suspended it's certification.

There's no reason to sabatoge the pipeline when a year before it was Biden who waived sanctions on it. What changed both country's stance was the invasion. Germany became fully onboard with shutting it down after the Ukraine invasion.

Only Russia has anything to gain from such destruction (if it proves to be sabatoge) at this point by keeping the pressure on Europe's energy situation.