Thank you for your feedback.
If you are pointing your camera at a document/QR Code, etc., you should see a yellow "scan" button on the bottom right corner. If you tap this button, it will automatically scan the document/pic. There should be a yellow outline around what the camera determines to be scannable. You can expand this outline if you wish to. Once the scan button is tapped, camera will display the scanned document which you can saver or retake.
If you are not able to see this functionality, please use the Samsung Members app to submit an error report to help us debug.
We appreciate your contribution to the Beta program.
One UI Beta Team