I agree with the SultanofSwat. Command and velocity go hand-in-hand. Your motion is ordinarily functional and far from exceptional.
In an exceptional motion, the Pitcher uses their Arm/Leg action to channel all their energy into their Throwing Hand. In your motion, your Arm/Leg actions create a barrier redirecting your energy away from your Throwing Hand.
In my opinion, too much of well-intentioned advice in this thread talks about what you need to do. To find out how to do what everyone is talking about doing, you need someone to break you motion into your kinetic pitching chain and then tell you your personal Arm/Leg adjustments that'll channel all your energy into your Throwing Hand.
Proper motion execution measured by your pitching chain will immediately improve your command and velocity.
L.A. "Skip" Fast
Pro Pitching Institute