These are carbon fiber propellers 40"long at the end of each arm
Propellers' free stream into the blades is like a flared-out cone. but the output near the backside of the blades is concentrated and cylindrical.
That's one reason big drones use multiple propellers, so they don't take away from the in-flow of each other.
The lift rideshare is planning to introduce autonomous rideshare drones. They have tested the prototype and have received FAA approval to test fly it. As can be seen, the propellers are kept at a distance from each other.