Will all aircraft have APPR mode wen global is released??


May sound stupid but as previously confirmed the new NAV mode will be entered by the APPR button so my question is what happens to the old aircraft that don’t already have the the button will it be added and only have the NAV mode or will APPR be in all air craft.

Final thing what will happen to aircraft like the Dash 8 and C130 they don’t have APPR but will still require the new NAV mode what will happen to them??

I apologise if this has already been asked/answered


NAV is available for all aircraft that have AP. Even if they don’t have APPR.