Russian Invasion of Ukraine -- Cyber & Drones?

Russia did a slow, methodical build-up of troops and equipment along the Ukraine border with Russia and Belarus that seemed to take at least 6 weeks. I would assume the US knew this was happening in November or December. I completly doubt that anyone in the US Government, or military really believed that Russia was just doing this as an "exercise." I believe Putin was "testing the waters" to see what sort of reaction he woud get from the US and NATO. The US and NATO could have (and I believe SHOULD HAVE) responded in force by deploying massive amounts of troops, weapon systems, and aircraft in the nearby countries, such as Poland. Romania, Bulgaria, and Hungary. The US and NATO has not done such an exercise for decades. NATO should have also set up medical centers and refugee processing centers in advance. I'm not sure why the US wouldn't our couldn't establish a no fly zone over Ukraine. We have done it in other parts of the world that were not part of NATO. I just finished reading the fall edition of Air Force Magazine. As retired USAF, I was very interested in the articles describing the space force, Cyber warfare, and drone modernization. I hope the US Cyber experts were attacking the Russian forces in some way to cause chaos. I'd think that the space force would be working to turn off or jam the Russian GPS system and space communication. I also would think that we would be able to use or help the Ukranians use drones to decimate the Russian tank force. On 60 minutes tonight there was an episode that talked about "The Grid" and it said that Russians had the power to damage our electrical grid. We've heard that they also have the ability to damage the Ukranian's "grid" -- I wonder if the US has done the same to the Russian grid? After all, Russia and Russian trolls interfered with US elections on multiple occasions