Flashing tello drone with Px4



I am curious to know if anybody tried to flash the Tello DJI drone with PX4?
Is it possible to do it?? anyone tried to do similar things with DJI drones??

I know that it is possible to do that with Bebop2 Parrot drones as they have a hidden serial port to connect directly
to board and have an access to a shell. So are there any similarities with DJI drones.

Best regards