QR Code Scanning during COVID-19

Currently, the country that I am living requires me to scan a QR code every time I made a visit to a public location. Up until early 2021, I was very happy with the way iPhone responding to QR code scanning. I simply open Camera (while iPhone is locked) and then it pops up a notification to whether send an SMS for government as a check-in data.

Right now, since iOS 15 updates, the way I need to spent my time to scan QR code has tripled. I took way too long to scan. I think this has to do with text recognition feature that iPhone has. Is there any way or 3rd party app that can help me to quickly scan QR code while the iPhone is locked?