These new drones fly at 6000+m (20,000 ft). Machine gun turrets aren't going to touch that.

They have to come down to hit a target though. Ukraine is installing the turrets near things worth defending.

Though their statements are they are getting 60% of the jet propelled drones with machine guns on F16s.

They also have drone interceptors in development that according to their statements on demonstrations can get jet powered drones and they are also working on things for ballistic missiles. As far as I know none of this is in use outside of demos, but they are working hard and they have incentive to make it work fast.