Iphone 16 Pro Max

I have updated from an iphone 14 to a 16 pro max. I followed the set up and used the back up from the cloud afer i made sure the 14 was backed up in the last hour. All well the 16 downloaded from the cloud and all was good. I do have an odd problem though. My Hive app and my lloyds banking app and a few other apps say I need to connect to my internet . Of course I am connected as all my other apps would not work etc. Can anyone figure out what is going on. I have turned the phone off and back on, went to airplane mode and back again. I even rebooted my router and reconnected but no joy. Any help please?