Struggled a lot after the update came to my device but after long research and multiple troubleshooting fixed the issue and finally now I'm with One UI 7Let me know if you have any concerns, if I can help you out.
Check this out buddy, you'll get a clear picture.https://r2.community.samsung.com/t5/Others/One-UI-7-upgrade-with-Android-15/td-p/19011117?src=ShareByUserCM