Lean the shaft forwards
One of the reasons I hit the ball a bit lower is that I have a little more forward shaft lean than most pros at address. I grew up playing on quite a windy course so that probably has something to do with it. The more the shaft leans forward, the more you de-loft the club so it stands to reason that the ball will launch lower if this influences your shaft lean at impact. You only need to lean it forward a touch and make sure your face is still square to your target.