Maybe try Samsung Smartswitch to see if an update is available that way.
Sometimes taking out the sim card and pop in another networks can instigate an update.
Software updates are sent out in waves to eligible phone's dependent on their build and serial number along with the particular region you live in,
If a phone has been supplied by a network then occasionally they can have their own update schedule.
If I can be of any further help then please don't hesitate. Take care. 😎
Daily Driver > Samsung Galaxy s²³ Ultra 512Gb in Phantom Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "