The US/EU is definitely in a proxy fight with Russia in Ukraine. Russia is definitely running disinformation campaigns and funneling money across the US and EU to try and tilt elections to their far right allies. There have been several high profile breaches of US institutions recently traced back to Russia and Chinese hacker groups.
So that covers actual fighting, political attacks, and cyber attacks. This is literally the definition of hybrid warfare. Here is the Wikipedia page on this: https://en.wikipedia.org/wiki/Hybrid_warfare