I think Poland is chosen by Europe as the advanced vanguard for reconnaissance in force, to see how serious Russia's intentions are to turn off the gas in case of non-payment. Now Europe has to pass the test of how United it is.
It's the opposite, Russia tries to test the waters.
Poland has already told Russia it will not renew its contract because it's getting the gas from Noway via the Baltic pipeline, this was known from the start of the year well before the war started:
https://warsawinstitute.org/polands-plan-challenging-russian-gas-dominance/Russia has begun to think of itself as a superpower with a little bit of power. Now he is threatening not to supply gas to other countries! For so long I have thought that if countries could not find alternatives, they would have no choice but to accept gas supplies on Russian terms.
But I got the amazing information from the link shared by @stompix. And it is only a matter of time before Russia's arrogant and aggressive attitude ends if the countries really form an alliance against Russia because of this alternative.
Although Russia will try to form an alliance with one of the countries. But, it remains to be seen whether Russia will face a single country hole against Europe. If Russia continues to threaten to cut off gas supplies, it will be a suicide for Russia.