2002 Ford Explorer Clunking near front driverside.

If the bouncing occurs at low speeds, like in a parking lot, check the tires for a broken belt.

Can you tell if the bouncing is due to bumps in the road or if it's due to something binding as it rotates? Clunks must never be ignored, especially on Ford products because that is often a sign of a suspension part that is about to separate leading to loss of control and a crash, but if work was recently done, the rest of the steering and suspension would have been inspected. A strut can cause a clunk that in itself is not a serious safety concern but it is possible for the shaft to stick, usually when it's fully-extended as in when the vehicle was on a hoist and the suspension was hanging down. That will hold that corner up real high and make a real miserable bumpy ride until it snaps free and goes back to its normal height. That sticking shaft can occur while driving normally too but it isn't very common.

Is the clunking random or does it occur at regular intervals, like once or twice per wheel revolution? Do you see or feel anything in the steering wheel?

I'd be looking at the half shafts next. Most problems with them can't be seen easily when doing an inspection so they will get overlooked unless the mechanic has a reason to look closer at them. Vibrations that show up in the steering wheel originate in the inner cv joints. The steering wheel will wobble once or three times per wheel revolution. Wear will make the steering system vibrate during acceleration. Binding can occur if the vehicle's ride height is altered.