QR code scanning might be disabled in Settings, please check the instructions here:
https://www.qr-code-generator.com/guides/scan-qr-code-ios/
For some phones you need a separate QR code scanner app. This page has instructions for different phone models:
https://www.qr-code-generator.com/guides/scan-qr-code-android/
Check that you have granted both the allow location always and physical activity permissions (if available in settings).
Check that your phone isn't in power saving mode.
If enough data still isn't coming, your phone might have a non-standard version of Android that prevents apps from running correctly. Read more at https://dontkillmyapp.com/
Contact us at support@timespace.co