It’s probably worth adding here that according to a quick google search - the cost of Nordstream2 project is $11B. So one might imagine that the costs of potential repairs are negligible in comparison.
>>Vincen+(OP)
Salt water entering the pipeline can damage more than just the single length of pipe that has the hole in it, so fixing it is can be uneconomical.
>>cpwrig+Sd
The repair costs have been estimated (by Nord Stream AG) to start at around $500 million. No word yet on whether they actually plan to repair it.