Missions in Ukraine Russia achive same results for 1000 times cheaper. Real war nowadays is cheap and mass produced.
As an example, Russia hits with drones a specific parts of the bridge using mesh network of ER resistant drones . Ukraine is sending drones for 2000 miles deep into Russian territory. F-35 plus payload is not capable of that .
What is the point of sending f-35 if Ukraine can send 5 cheap rockets? And deliver 2-3 tones of payload over the most sophisticated air protection in the world ?
Those cheap drones and missiles are only effective against relatively soft, static targets. As I already explained above, manned aircraft are still the only platforms capable of executing critical missions in complex, dynamic environments. Maybe that will change in a few years but not today.
Ukraine and Russia are both second-rate powers making do with what they can manage because they're too poor to afford anything better. The systems that sort of work in Eastern Europe likely won't be effective in a major conflict between the USA and China around the First Island Chain. (Let's hope we don't have to find out for sure.)