Question about NATO personal arms used by Ukrainian forces

As I know, NATO supports weapons for the Ukrainian military, they're mostly the old weapons, the old versions. Some proved their effectiveness in battlefield while some didn't make it to help the soldiers. Besides artillery, tanks, IFVs, aircrafts, etc, personal arms are there as well

Some Western weapons like FN FAl, FAMAS and M4s are seen in combat footage. I don't read or watch much, just read an article a long time that it said Ukraine soldiers prefer to the AK type instead of the Western guns. Explained because they work well despite the bad environment, troops have been used to the AKs, etc

I hope my question will be answered. Just wonder what the Ukrainian troops think of the NATO firearms they experienced with. What they don't like and what needs to change for the better. Because after this war, there'll be a big change in modern warfare, personal arms may have a change as well

All comments are welcomed. Thank you

Slava Ukraini!!!