Hey @karlosslim! When you say that your phone has not been backed up, has a back up been removed from one of your accounts? Also, is your data still on your phone? Sometimes after an update your phone will take you through a few questions as if you were setting it up from scratch, but it's just to confirm your Settings for new features. 🙂
@karlosslim Certainly agree with @antikythera that it is best to have a few back up options in case of any issues and I would not rely totally on the Cloud. Some advice in this article https://www.digitaltrends.com/mobile/how-to-backup-your-android-smartphone-to-pc/
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My Device- S21 Ultra 5G ( SM-998B/DS ) CSC= BTU , 12GB/256GB
One Ui 4.0,Android 12 Official Version.