You Can Easily Scan QR Codes That Are Already On Your Phone

Android and iOS both have built-in tools to easily open QR codes from screenshots.
Android Authority

Your Android phone could soon auto-zoom into QR codes for scanning

Google updated APIs responsible for the barcode and QR code scanning to allow them to auto-zoom when a possible barcode or QR code is detected. This feature could soon roll out to Android 13 and above ...