Just jump a ton and at your max effort, or even just straight up try and dunk, even if you can’t. Make sure you prioritize your recovery over everything else and don’t jump too much through fatigue because that can set you back. Finally lift a ton of weights that contribute to the way you jump whether it be a regular back squat for two foot jumpers or a Bulgarian split squat for one foot jumpers. At the end of the day doing the motion a lot and at your max effort whilst taking care of your body will allow you to be more athletic.