So why did Russia stop delivering gas via Nord Stream 1 from 09/2022 on (before the sabotage)?
The Russians are managing to bypass restrictions to some degree using their “dark fleet” but that’s oil, and hardly a case of Europe continuing as if nothing were.
One of them, still active until this December when the contract ends, is through Ukraine. https://en.wikipedia.org/wiki/2022%E2%80%932023_Russia%E2%80...
First result is a detailed page from the European Union, showing amongst others a diagram that EU imports from Russia were divided by three.
https://www.consilium.europa.eu/en/infographics/eu-gas-suppl...
Of course the EU could lie, but that seems unlikely. It could also be that Russia is selling to the EU without the EU knowing it. For oil that is almost certainly the case to some extent. For LNG you need very specific infrastructure (boats, terminals) that are not compatible with the famous “dark fleet”.
Russia is probably selling the gaz to someone else, or at least trying to. But in that case at a discounted price and with less margin because pipelines cannot be improvised, so they have to use more expensive means of transport.
Mind you those figures were 2023 and they will have reduced even more most likely. But Europe is still buying gaz to some extent.