Releasing the wrist angle

[pnearn]

Given you have shifted your weight, began to rotate and held your wrist angle down into the delivery position as in the attached pic, are there any good drills to learn how to properly release that angle through impact (keeping the right arm bent, right wrist cupped etc)

I feel this move in different ways, sometimes a shoulder turn, sometimes a forearm rotation, sometimes an upper arm swing and I think this may be the cause of some of my inconsistencies lately

TIA guys!