Network mode not showing for 5G
I bought my phone from ATT samsung s21 ultra 5g and love the phone. And I signed up for the Elite unlimited plan for 5G. Now I want to make sure my phone will use 5G when in an area that it is avaialble. So I googled it and went to Settings - connections - mobile networks but there is no Network mode listed. Why is it not listed and how do I fix it ? I want to make sure I'm ready to use 5G when ever I' in an area that has it. I checked the ATT 5G coverage map and it said that my address was listed as having 5G. Yet when I take my phone off wifi all I get is 4G LTE.