Wasn't it the point of Nord Stream sabotage? https://brian-whit.medium.com/nord-stream-sabotage-a-look-at...
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The exact reasons aren't entirely clear, originally they hated NS because it allowed Europe to ignore Ukraine in the gas trade which left them more exposed. By the time of the full scale war I would bet the reason was more "fuck Russia" than anything more carefully reasoned.
(Not saying that's the case here, all considered)
But actually, by the time of the bombing the Russian gas was only flowing through Ukrainian pipelines. So Ukraine was ensuring "income to the Russian war machine", while Nord Stream was just costing them money; at most it could have been used as collateral in a loan.