Kindly reset factory data with backup then try to it's again. 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.
As per your concern, we would like to inform you that the April, May, and June security updates have already been released for the Galaxy S23 Ultra series. You can manually check for the software update on your device by following the steps below:
Path: Settings > About phone > Software update.
If you are still not receiving the update, we kindly recommend visiting a service center to have your device inspected by our technical team. They will provide you with all the necessary information after physically examining the device.
