I think the blades are added there for deception, most likely it won’t have blades.
They are still very deeply limited by compressor technology, regardless of whether they use combustion or electric propulsion.
https://newatlas.com/aircraft/jetoptera-bladeless-hsvtol/
> Jetoptera is developing VTOL (Vertical Take-Off and Landing) aircraft that use a "Fluidic Propulsion System" (FPS) instead of traditional rotors or propellers, acting like "bladeless fans on steroids". These systems use compressed air and the Coanda effect to generate high-speed thrust, promising quieter, more efficient, and faster flight (up to Mach 0.8) for aerial mobility.