Wolf-cries aside, Ukrainian pilots have been training on F-16s' capabilities (they are down-rev "A" versions, IIRC) and corresponding tactics (for which they were designed) for a year or more. It will be interesting to see, if it is reported, how Ukrainian pilots blend the F-16's capabilities, western tactics, and the tactics they have been using for years on Soviet-design planes.
As an aside, the US learned an amazing amount from our cooperation and alliance with Israel about the capabilities of 60s and 70s Soviet planes and corresponding Soviet tactics. The same has been happening in the past nearly two and a half years, knowledge and understanding probably worth much more than the $$ value of the aid Ukraine has received from the west (not that isolationists and Ukraine-Haters would admit this ... any more than Irael-Haters admitted it in the 70s and 80s).