The explanation is given in this thread from xdadevelopers.com @AamirKhan
Daily Driver > Samsung Galaxy s²² Ultra 256Gb in Phantom Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help.
Android 12 is rolling out on some later released A devices as shown in this article https://9to5google.com/2022/08/18/samsung-android-12-update-rollout/
I do not work for Samsung or make Samsung Products but provide independent advice and valuable contributions.
My Device- S21 Ultra 5G ( SM-998B/DS ) CSC= BTU , 12GB/256GB
One Ui 5.0,Android 13 .