The manufacturer states the Liberty Ammunition Civil Defense 9mm Luger +P 50 grain Hollow Point Brass Cased Centerfire Pistol Ammunition is lead free but doesn't specify the bullet or primer material. I recommend contacting Liberty Ammunition for that information.
When companies say lead free they are talking about the projectile. It doesn’t have a lead core. Most projectiles use a lead core for expansion and cost.
The primers will be the same primers they normally use. As hard as it is to even find primers right now, if any company is using anything that is different than every other company, they would list it as a selling point. The amount of lead if any in a primer is hardly measurable compared to the majority of the weight of a bullet being being lead and left in the environment.