greetings, I wonder when the DJI pilot implemented for three phanton the option of fixing points and flight routes for a perfect flight.
Thank You.

The features you are talking about were "coming soon" for the Pilot app when the DJI Inspire was announced in November - and never delivered.  The current guess is that DJI will never deliver them and instead let other companies sell software to do this.  Unfortunately if another company's software crashes your aircraft there will be no warranty coverage.