There IS a full scale war going on. 31,000 confirmed dead Ukranian soldiers, and up to 120,000 dead Russian soldiers. We don’t even have a good idea how many civilian deaths, but the total death toll could be as high as 500,000.
And no, before you start - Mutually Assured Destruction isn’t “a full scale war”. Its Annihilation of both sides, and has no precedent in the history of war.