Europe will need to import gas. Pipelines are much better in terms of security of supply than ships as they also lock in the seller. Gazprom pays for infrastructure essentially and sells the gas. I see no issue. If the Polish are annoyed, so be it. They can and do buy their gas elsewhere.

Yes, hydrogen might be a part of the solution in the longer run. Can be produced locally and ideally in big industrial clusters with proximity to offshore wind. Can also be mixed into the gas grid in limited form.

Buying hydrogen from Russia will never happen unless produced with carbon capture.

Biden admin admitted that Nordstream is a fait accompli. Wise not to push more. It is the decision of European countries and companies.