Yes and no. If I’m reviewing an Event in landscape and another Event gets pushed to my phone, I have to switch the phone to portrait as the new event loads and then back to landscape to view it in full screen mode. People look at me like I’m playing some race car video game twisting my phone around. It would appear the app is checking for the change of state of orientation from portrait to landscape and not the state of landscape.
If the phone is sitting an a holder in landscape position, even if one has to suffer through looking at it sideways, it’s really nonsensical to have to push a bunch of buttons to get to landscape mode when the device already knows this. If you like looking at everything sideways, you can always lock the orientation of the phone.
Unfortunately, landscape support is listed as “researching”, but the OP states they haven’t started yet.