Sometimes, not to do something can be the right (morally, technically, economically, ...) thing to do.

You don't always need to present the other cheek to do right. Neither do you always need to retaliate.

Nord Stream finally made it clear to Germany that "convenience" isn't a durable energy market strategy.

It's not correct though that Germany has done "nothing". The suspects are pursued by Germany, https://www.dw.com/en/nord-stream-poland-blocks-extradition-... so there's that.

If you mean though whether there's a will in Germany (nevermind a commitment or funding) to rebuild Nordstream ... you're right, nothing has happened