Install net monster and select NR only. It will always be 5G only. Remember when no 5G in Area it will to connect to 4G. To continue for 4G again you can change in network settings
Kindly complaint to Samsung customer care support through Samsung Members app as error report also send log files along with this error report for this issue and wait for next update it's maybe fix by Samsung team soon. If you like please accept it's as a solution it's help to other users also, click on 3dots in my reply section and click on accept solution. Thanks.
