On the P30 Pro you may have to download a QR reader or QR scanner app, since the code reader is not included in the camera software. To read or capture a QR code on your P30 Pro you have several options, if your Huawei P30 Pro has the Play Store application store, look for its icon and click on it.
How do I scan QR code with Huawei?
Scan QR code from image on Huawei phone Open the Gallery app on Huawei phone, tap on the image to reveal the bottom menu. Choose More, again wait for a second until you see the 'Scan QR code in image' option at the bottom of this contextual menu. Tap on this option to allow Huawei phone scan the QR code from the image.Feb 4, 2019