Game Engine Encryption for iTunes Connect Export Compliance?
You can safely select no in this case.

The said clause is applicable if you are encrypting user/app generated data either using iOS SDK provided or any other 3rd party APIs.

What you are getting from the Game engine is getting added as an asset to the Xcode project, which will ultimately generate the iOS app, the clause doesn't apply in your case.

Additionally, take a look at this help document from Apple:


 Export compliance documentation for encryption.


It should further help in answering your query.