It seems to be how Android 11 with Samsung One Ui 3.0 now deals with dual sim.
If you perform a search on the forum you will come across existing threads on this too @Aligater from people using your model of phone and others using different models too so it's the software.
A person can send feedback direct to the Samsung Development Team via Get Help in the Samsung Members app.
Maybe if enough people send similar feedback then Samsung will take note.
Perhaps take a look at these.
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. " This is the way. "
Is it possible to use a nano storage sim in the S21 Ultra? Something like the Huawei 128 GB nano storage sim. NM Card 128GB and 90MB/S Nano Memory Card Nano Card only Suitable for Huawei P30/P30pro/P40 series/M...
This was a question I would like to know the answer too. I don't think it is supported but wish it was.