Sign in With Apple FaceID in Apple CNA

Hello,

I am currently working on a captive portal solution, which implements the sign-in with Apple feature. I have developed the feature to authenticate a client using a username/password. Authenticating the portal through iOS safari authenticates using the FaceID mechanism. However, the FaceID mechanism appears in the CNA but never authenticates successfully. I created the SSID in the meraki cloud controller with the required ACL's whitelisted from the below link. However, the issue still keeps occurring. https://support.apple.com/en-us/HT210060

Anyone else facing this type of issue, please provide some insights.