The gas leaks are not "far from Russian controlled territories." That's pure nonsense. Russia has plenty of submarines that can travel from Russian territory to the region -- actually Russian subs regularly visit this region.
Russia has said they will not send any more gas to Europe unless Europe lift the sanctions. If you have followed the news, you know that this is not going to happen anytime soon, and most likely it would never have happened again, even without the pipelines being damaged.
Poland has very little to gain by blowing up the pipelines, and much to lose if Poland's allies discover that Poland had done this. In particular in the current situation, it makes no sense. No gas is flowing currently, and there are no indications whatsoever that gas will flow in the future, gas leaks or not.
It was recently reported that powerful explosions were detected in Norway, Sweden and Germany, that coincided in time with the start of the gas leaks and geolocated to the pipelines:
Registrert kraftige eksplosjoner ved Nord Stream-ledninger: – Noen som vet hva de gjør – VG
Danish and German authorities suspect Russia is responsible.