How to display Android app in landscape mode?

[Ryan Chapman]

I'm developing a simple management app for the Vive Focus 3 using .NET Maui. When I run the same app on Oculus, it lays out in landscape mode like the rest of the admin apps. However, when I run it on Vive Focus 3, it orients itself vertically in portrait mode, which makes the UI unusable. I could adjust the UI, but I'd prefer if it would simply lay out landscape. I tried something like this:

        RequestedOrientation = ScreenOrientation.Landscape;

but it had no impact. Is there a setting in AndroidManifest or similar that will orient the app the right way?