It might be influenced by the buzz from Russian propaganda - they tend to report 146% support based or "research" conducted by VCIOM. Sure, expect representative numbers from state-run company (all others are extinct) in a country where you can get imprisoned (and tortured) for saying "war" out loud. If you call someone a dog for a month one day they might start barking. Western (and Ukrainian) media share that shit stating "80% russians support putin bla-bla-bla"