The certificate does state such motive flow is available at a port of the FCU and it can be used to drive pumps, either jet (ejector) or turbine pumps. It doesn't say these pumps are already in place, but if they are installed, and if their design matches, they can be powered by tapping the related port.
This question: What is motive flow and why is it used in some aircraft hydraulic systems? explains both the motive flow and jet pump concepts and what are the main uses of jet pumps (e.g. fuel boost and scavenge pump).
So the only missing element is what is a turbine pump. It's a pump which is driven by a turbine. A turbine in general is a device converting fluid energy into rotational motion, like in a turboengine. Here the fluid would be fuel from the motive flow. It would turn the pump. The pump itself can be used to move a fluid, likely fuel, like in the jet pump.
The choice to drive pumps by the motive flow is to rely only on the engine for providing the energy. Once started, this system engine-pump is autonomous.
This is similar to using fuel as a power source for other elements in an engine, e.g. moving variable blades.