Not able to find the extra-data on iOS device

When working with extra files in AWS Device Farm for iOS devices, the location of these files depends on how they were packaged and uploaded.

For iOS tests, extra files that you've uploaded as "external data" are not automatically placed in the Documents directory. Instead, if you've uploaded your test package as an IPA file, your extra files would be located inside the .app directory within the Payload directory.

Specifically, you would find your extra files at a path similar to: /tmp/Payload/*.app/extra_file

If you're using Appium with Robot Framework, you can access these files by using the correct path. You might need to unzip your test package first using:

unzip $DEVICEFARM_TEST_PACKAGE_PATH -d /tmp

Then your files would be accessible at the path mentioned above.

For iOS applications, if you need to access these files from within your app, you would need to copy them to a location accessible by your app, such as the Documents directory. You can do this as part of your test setup.

If you're specifically trying to upload a JSON file through your app's upload functionality, you'll need to first locate the file in the test package location and then use Appium commands to interact with your app's UI to perform the upload.

Remember that iOS has stricter file system access controls compared to Android, which might be why you're having difficulty finding your files in the expected location.
Sources
Adding extra files to your test package in Device Farm - AWS Device Farm
Get high quality with correct frame rate video recording on iOS | AWS re:Post
Accessing Gallery of an iPhone for Test Videos in Appium via AWS: Is It Possible? | AWS re:Post