Iphone 16 camera control button not working ios 18.3.1

My Iphone 16’s camera button is not working . software release im using is 18.3.1 . When I was buying it in last december , it was working well. But after months in the last few weeks I saw its not fully functional. After turning off and turning back solved the issue then. But now its also not working . I guess probably could be a Software Issue. What’s the troubleshooting for this?