The rigging of an arm, as per the Blender 3.4 documentation (Rigging a Hand and Foot), has IK solvers placed at the wrist. These allow you to move the hand and the arm will follow. The elbow joint will be positioned by the IK solver.
My animation demands a changing position of the elbow. I think an IK solver at the elbow joint will allow absolute positioning of that joint.
Does anyone think this will work?