Question about HDMI Output in Portrait Mode

I’m using the Blackmagic Pocket Cinema Camera 4K and trying to output video in portrait mode via HDMI. Will there be black bars on the sides of the output in this mode? If so, is there any way to adjust this via settings? Thank you for your help!

It works perfectly fine here if I use DisplayPort, but I think it all depends on your receiving display, not the app.