Thanks for sharing it here in the Roku Community, @traceventura.
We understand that you're experiencing trouble getting the Roku Mobile App to work with your Android 11 devices. We'll surely help you resolve this issue.
Have you tried removing the application from your device and then reinstalling it again to see if it resolves the issue you are experiencing?
We recommend trying this step. Please keep us posted on what you find out.
All the best,
Emman
Emmanuel-D.
Roku Community Moderator