Baitboat autopilot ON FlySky

Hello, I have a bait boat with pixhawk 2.4.8, and I need to select an waypoint to navigate using a switch on my flysky remote . It is possible to do this? I see a video on YouTube with somebody doing this. Bait boat Autopilot for Flysky i6x - YouTube
I use ch7 to save a wp, but after thet I don’t know how can I select an wp number to navigate to this directly from my remote switch .
Thank you in advance.