As for the F-16's if the US and rest of NATO didn't think they would make any significant difference I doubt they would go through all the trouble of training dozens of pilots and crew to fly and maintain these things.
All I can see is that how many they enlisted in total in 2023, I think Putin said recently there wont be any new enlistment yet.
Can't find any evidence of this, just a photo showing an explosion somewhere near the bridge, which could just be the oil tanker on fire