I'm also interested in this topic. It seems to me that the propellers are very similar in terms of attachment mechanism, but DJI propellers are slightly longer. Therefore, it is logical to assume that the KV rating of the motors for mini 3 and nano drones would differ slightly. The longer the propeller, the lower the required motor RPM. Replacing just the propellers might cause an overload on the motors. So, I have an idea to replace the entire motors along with the propellers.