Thank you for sharing with us your feedback.
We apologize but now Beta testing for UI 3.0 is not available in this region. However, the UI 3.0 and the Android 11 will be released in the the region soon. Please stay connected, and stay tuned.
Security updates can be provided monthly however there are reported issues also on some device and Samsung is rolling out the security updates together with the updates that can fix the reported bugs.
If in case, you may any issues that compromise the security of the device, please report it to us immediately. We request for patience because Samsung is also ensuring the quality of the software before it is released.
If you require additional support, feel free to call the call center, visit a service center to check out this page : https://www.samsung.com/ae/support/
Thanks, hope this helped clarify your concern.