The system is identical to P3D, and it really depends on the airport and the gate you are using. If there's only one handler getting the maximum possible score, or the gate has been customized with a GSX profile that set the handler, the menu will be skipped, since it would be useless to show you a menu with just 1 choice.
I suggest checking the last pages of the manual, starting at Page 75, which has been updated to explain how the scoring system works.