External display support for iPad

Hi,
my iPad supports external display but Dorico for iPad is missing that function which is available on Mac or PC version.
I need this functionality because of the following realistic scenario:
I have a midi file with a couple of instrument channels. I want to let Dorico to play some instruments but the one line which I want to play live, I just want to see its notation. This is possible using show on external display on Mac or PC but not available on iPad.
Would you please implement this feature into iPad version as well?
Thank you so muss.
Best Regards
Manouchehr