Why a carrier is the wrong tool for attacking Russia's Arctic route

Would NATO send a carrier strike group along Russia's northern sea route to attack gas infrastructure?

Probably not. Land-based bombers can reach fixed infrastructure more easily, while attacking the icebreakers could close a route that is already seasonal and difficult.

Fixed gas infrastructure can be attacked more directly by land-based bombers operating from North America and other allied bases. A carrier group has more valuable missions against naval bases and deployed forces in the White Sea or Pacific approaches. Much of the northern route is icebound outside summer and remains difficult even when seasonal traffic is possible. Because that traffic depends on icebreakers, disabling the enabling fleet could close the route without exposing a carrier to the passage itself.