The war in Ukraine is an imperialist war fought between the capitalist elites of one country vs the capitalist elites of its antagonistic bloc
It's an inter-capitalist war, sure, but it's not an imperialist war- at least, Russia is not the imperialist faction. But whatever I could say you've already seen already. We definitely have different versions of based to say the least
Are we going to pretend that imperialism only exists in this specific and convenient definition that you make and did not exist before industrialization and the financialization of economies, or that the Russian entry into this war was for "imperialist" reasons or that Russia is exploiting its new territories (which have always had indigenous Russians as the main population base) in the model (of "expanding markets and abusing cheap resources/labor") you describe, rather than painstakingly taking effort to integrate and develop the regions that Ukraine and the collective west has been shelling for a decade?
There is a clear difference between the imperialist warmongering of the western nations, and this war of defense by Russia, capitalist as it may be- a war to defend their country from being further encircled, threatened, and carved up, and to protect the legitimate human rights of the indigenous Russo-Ukranians. The entire majority of the world can see it, but somehow you- by the looks of your recent comment history, a Spaniard (white west European, whose imperialist heyday it should be noted fell outside of the definitions of imperialism as you describe it) conveniently do not. I'd recommend taking a look at your own biases, because you're clearly Euro-brained and it's not a good look.