A few companies will avoid testing in Ukraine because they know they will fail. There already is a bunch of systems that already haven’t survived the conditions.

Examples-

Excalibur m982 guided artillery shell. Russia got so good at jamming them that less than 1 in 9 hit the target. At almost $100k per shell they are a massive waste of money.

Anduril Industries and Skudio haabe failed massively with their drones in Ukraine.

https://www.techbuzz.ai/articles/anduril-s-autonomous-weapons-fail-in-tests-ukraine-combat

https://www.sofx.com/us-drones-underperform-in-ukraine-skydio-and-others-face-setbacks/

RCH155, Skynex, IRIS-T SLM and so forth come to mind. There are also a lot of drones from outside Ukraine, which are donated to them for testing and improvements. SMAP/T-NG is also going to see service in Ukraine first.