I appreciate your responses.
I have thoroughly examined the nozzles and used a pin to ensure that they are spotless. They appear tidy. The left nozzle appears to be lacking a hose, but when the washers are tested, nothing emerges from the hose barb. The left nozzle on my F11, which is up for sale, has the same barb without a hose. I am aware that it functions, so it must be as intended. The F01's rightmost orifice, the one closest to the container, emits a feeble projectile, whereas the other two emit nothing but weak dribbles.
The left and right injectors appear to have disengaged from the hood at the rear (facing the windscreen), but this has no effect on the vehicle's performance. The middle nozzle is almost detached, but that is not my concern.