It's just a Monthly Security Patch Update. Aur Android 15 with One Ui 7 ke Stable Update ke regarding koi bhi Official day/date Company ni declare nahi ki hai.
It's quarterly security patch level update for your's device security and you will be get One UI 7.0 stable version update may be in this 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.
