We also had Nordstream2 sanctioned while Trump was POTUS. Putin blew up that pipeline politically when he launched Russia’s latest genocidal war of choice on Ukraine. Whatever happened to it physically after that is immaterial at this point. That’s why, most likely, Russia blew it up. They knew it was never going to be used.
I don’t know. A brief internet search reveals the following from CNN in 2022:
“What is Nord Stream 2 and can Biden kill it?”
https://www.cnn.com/2022/02/08/business/nord-stream-2-germany-biden/index.html
From the article:
“If Russia invades … there will no longer [be] a Nord Stream 2,” Biden said during a joint press conference with Scholz. “We will bring an end to it,” added the American president.
The right way to combat Russian energy influence was pursued by President Trump. Increase US energy production and exports. That is not what Biden chose to do.