1st one Samsung will never give as they provide qr code only either in camera or in Samsung internet,, second one ..you have to install s secure which is Samsung official app locker ,, if it's not putted in devices from factory version then have to install from galaxy store otherwise not going to give via software update ..... 3rd one clear camera app data then try ..if then also problem not solved then try a factory reset ,, if then also not solved then try to flash your last software via service center or via Odin tools
1st one when we trying to scan the code ,it will open the camera app .takes like a photo accepted .if we opens it displays only a photo what we have taken 😭
