The constitution does not specify a particular turn of phrase to declare a war.
They authorized the use of military force, and did not specifically call it a police action, humanitarian aid, armed conflict, peace keeping action or any of the other phrases for not quite war.
Further, every leftist and “progressive” has called it nothing but a war.
I agree that the Constitution does not specify a particular set of words.
However historical tradition has established a precedent of what a declaration of war should be.
A Congressional authorization of the use of force does not meet that standard. It’s merely acknowledgment from the legislature that we can defend ourselves, which is already one of the inherent powers constitution already provided to the executive branch. In short its Congress courageously saying yes we agree you can do what is already in your right to do ! Big Deal !