The theme option is missing from the settings. So can no longer turn on dark mode.
I was using fine when it was in labs. When launched. I turned off in labs. And enabled in the themes menu.
All was good for a while, the when I upgraded to iOS 16. App went back to light and theme option and lab option both gone.
iPhone 11 Pro Max
Latest app version 4.48.0. Also tried in latest TestFlight version. 4.49.0