TBH I'd be nervous replacing a metal part with a 3D printed plastic part.
When I broke a hook plate a year ago Skydio was going to sell me one. The rep wanted to know if I had inch pound torque wrench, I told him I did. He said he had to clear it with his boss.
"John" called me back and said he couldn't sell it too me. He said they needed to check the motor, balance, vibration... and run it on the calibration machine or it may affect the sensors.
I used to replace the plates on my DJI and other drones without issue. How much is hot air and how much is true I don't know, but I wish there was a precision metal one out there.
From what I see the prop is centered by the motor shaft (which could get bent), and the hook plate holds the prop down.
It's been a while but I remember DJI had some defective hook plates on the Inspire which caused some crashes and unnecessary vibrations.
It sucks but I sent mine in.