No beta firmware was found. So there will not be anymore beta updates. You have to wait for stable update. But like you said, it'd be nice if they provided a beta update instead of making us wait for a month for the stable update
As per your concern, we want to inform you that you will get the stable One UI 6 soon. Kindly be rest assured you will be notified when it is released for your device.
If you are facing any issues, kindly share the log file. This will help us to further investigate and resolve this issue.
To attach the log file: Samsung member > Click on beta banner > Switch to beta mode > Beta feedback > Send feedback > Error report.
Note: To ensure relevant log information is included in the error report, submit the report within 3 minutes of encountering the bug or error, and do not terminate (swipe away) the Samsung Members application until you are notified that the report has been sent. This can take up to 5 minutes.
