He said they couldn’t fire the U.K. or US weapons because of software, I am pretty sure it wouldn’t take months to simply upload the software from either countries into the system. I believe Ukraine said they would take them as is and update later as they could get around the ammo issues.
Ukrainian operated French Caesar’s in operation doing a quick shoot and scoot to avoid counter artillery strikes, shame no one bothered to tell the film crew that standing at the point of firing and filming them rapidly departing wasn’t the smartest of moves