Iris wipe post fx with Blit command buffer on Universal Render Pipeline.
Assign a 2D or 3D gameObject to the "Target" variable of the controller script and it will automatically pass position to the shader
Set the gameObject layer to UIOverPostFX if you want the object to stay above the effect
Invoke this 3 methods to control iris effect. Transition-In, Move FromAtoB, Transition-Out.