I used this to get the maps to show on both screens (The bottom option is what mine is set at).
This details below showed that I originally had the middle setting which allowed nav maps to be showed on either but not both simultaniously (abilty to switch nav maps yes).
I then changed this to the bottom setting (ability to switch nav maps no) and wrote it.
On starting the car the following morning when scrolling through the different dash displays I had maps in both screens if I wanted.
No maps on dashboard:
Infotainment 5F - adaptation ->
Dashboard_Display_Configuration-ability_switch_nav_maps, no
Dashboard_Display_Configuration-navigation_map_compression_mode, RLE
Dashboard_Display_Configuration-navigation_map_resolution, 0
Dashboard_Display_Configuration-navigation_map_transmission_mode, OFF
Maps with setting on infotainment display:
Infotainment 5F - adaptation ->
Dashboard_Display_Configuration-ability_switch_nav_maps, yes
Dashboard_Display_Configuration-navigation_map_compression_mode, H264
Dashboard_Display_Configuration-navigation_map_resolution, 1
Dashboard_Display_Configuration-navigation_map_transmission_mode, IP_streaming
Mine with maps on both display:
Infotainment 5F - adaptation ->
Dashboard_Display_Configuration-ability_switch_nav_maps, no
Dashboard_Display_Configuration-navigation_map_compression_mode, H264
Dashboard_Display_Configuration-navigation_map_resolution, 1
Dashboard_Display_Configuration-navigation_map_transmission_mode, IP_streaming