I have been doing research and development for many years to increase the efficiency of propellers (and impellers). Nowadays I know everything about propeller hydrodynamics, I can design a propeller for each craft and for each drive.
But for e-foil, unfortunately, you can not get a highly efficient propeller because it is not produced anywhere.
Boat propeller is not suitable for e-foil because it has low efficiency - inappropriate blade shape, incorrect blade number and sometimes inappropriate hub shape.
The high-quality e-foil propeller must be made of metal. Just good aluminum. The plastic filament used for 3D printers is therefore completely inappropriate for making the propeller. The water pressure would bend the blades very easily, which reduces efficiency.
This topic is to make it easy for a company to start a propeller in several performance types and at a favorable price. Unfortunately, quality propellers can not be produced in domestic conditions. One company is able to cover the need for all e-foils around the world.