Universal Links are properly configured for iOS

Without a valid apple-app-site-association file, iOS treats your HTTPS links as ordinary web URLs and opens them in Safari instead of launching your app. Users who tap a password-reset link, a share URL, or a post-purchase confirmation get dropped into a browser session with no app context — they abandon, or worse, complete a flow in an unsupported UI path. Apple's Universal Links spec (apple-universal-links) requires server-side verification; if /.well-known/apple-app-site-association is missing or misconfigured, the OS silently falls back to Safari with no error shown to the user or the developer.

Place the apple-app-site-association file at ios/apple-app-site-association and ensure it is also served at https://<your-domain>/.well-known/apple-app-site-association with Content-Type: application/json and no redirect.

{
  "applinks": {
    "apps": [],
    "details": [
      {
        "appID": "TEAM_ID.com.yourcompany.appname",
        "paths": ["/*"]
      }
    ]
  }
}

For Expo-managed builds, add the domain to app.json instead:

{
  "ios": {
    "associatedDomains": ["applinks:myapp.com"]
  }
}

Replace TEAM_ID with your Apple Developer Team ID. Verify the file is reachable and returns HTTP 200 before submitting to the App Store.