Authenticator app option is not working

[JarvisYang123]

We enabled both Email factor and Authenticator app . It can show Email factor properly and the verification codes workflow is working. But it doesn't show QR code to be scanned for the Authenticator app. Here is the setting

When the user login, it only show email factor option.

If you can assist to check what are other settings we need to set up or how to allow authenticator app option working, it will help us a lot. Thank you

Best Regards, Jarvis Yang