Nato has had advanced drone capabilities for a long time now, but was mainly focused on stealth and reusability rather than mass production. I know drone swarms to accompany stealth fighters and navy ships have been in development for some years now, but the mass use of disposable drones is not something there was a real need for. But I have no doubt that modern infantry training will start including drone usage and tactics, if that isn’t the case already.
Now watch them go back up in two years once reckless deregulation starts to kick in.