It is entirely reasonable that, similar to the aftermath of the 90s wars, weapons from Ukraine will turn up in every major conflict zone - especially because the current supply from the Balkan is all 30 years old decrepit shit, whereas Ukraine (rightfully) got the very best of the best of Western weaponry.
[1] https://www.nordbayern.de/region/nsu-prozess-gericht-will-he...
[2] https://www.dw.com/de/waffenlager-balkan-kalaschnikow-300-eu...