Beta closed now. You will be get One UI 8.0 stable version update may be in next quarter. If you like please accept as a solution it's help to others users also, click on 3dots in my reply section and click on accept solution. Thanks.
The beta program is full for S24 and soon the beta program will start for S23 Although Samsung has not released any list yet but you can expect a stable ONE UI 8 in October/November 2025 and Samsung never says the exact date so be patient until you get notified
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