5G connectivity with JIO India for 12 pro max

Dear Sir

I am having 12 pro max having latest iOS 16.3.

since last month Jio Reliance my operator has started 5G services in my city.

I have changed mobile data setting to 5G Auto.

I'm having sufficient plan.

Network selection is automatic but still network selection tab showing as "JIO 4G"

I'm not able to use 5G even having.

Please suggest me for further settings.