No, you are wrong.

Russia are at war with Ukraine, so they are bombing them. Ukraine have every right to reply with their own long range weapons too, and that would indeed not be an escalation in the fighting itself.

But, the west clearly prohibited the use of their donated long range weapons in direct attacks on Russia, in order to limit their liability, responsibility, 'participation' or whatever, until now.

Russia have been very clear that such permission would constitute an escalation OF WESTERN 'PARTICIPATION' in the war, and even be tantamount to a direct NATO attack, and so it is at least an escalation.

Whether it is right or wrong is not the point, it is a clear change in the depth of western involvement.