Apple Sign In — given_name/family_name never available in ID token or /userinfo

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When users authenticate via Sign In with Apple OAuth flow (through react-native-auth0’s authorize(), which uses ASWebAuthenticationSession), the Auth0 ID token and /userinfo endpoint never include given_name or family_name; even when Auth0 Post Login Actions are configured to map them. This makes it impossible to prefill a user’s name during onboarding, which is a requirement Apple explicitly enforces (App Store Review Guideline 5.1.1).

Environment

  • SDK: react-native-auth0 v4.6.0

  • Platform: iOS (React Native)

  • Auth0 Connection: Apple social connection (production keys configured)

I’ve tried adding the following Post Login Action to map Apple’s stored name fields to OIDC claims:
exports.onExecutePostLogin = async (event, api) => {
if (event.connection.strategy === ‘apple’) {
const firstName = event.user.first_name;
const lastName = event.user.last_name;
if (firstName) api.idToken.setCustomClaim(‘given_name’, firstName);
if (lastName) api.idToken.setCustomClaim(‘family_name’, lastName);
}
};

Observed Behavior

Both the ID token payload and /userinfo response are missing all name-related fields. The name claim is set to the user’s (private relay) email address, not their actual name. Full observed /userinfo response

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