Let's refresh your app data to clear out any temporary glitches and bring back missing features like manual expense entry.
For Android: Navigate to Menu > More Options > Settings > Refresh Data, then select YES to confirm.
For iOS: Go to your device Settings > General > iPhone Storage > QuickBooks Online > Offload App.
Once done, please restart your mobile phone and check if it's working. If the issue persists, we can uninstall and reinstall the app to refresh its functionality.