There’s no documented setting for that. Imagine if there were: many apps would use it and thus defeat the purpose of the offload feature. For now your best bet is to advise the user to disable the global offload feature, with a detailed explanation of the motivation for doing so. But it’s still the user's choice. You could also file a Feedback requesting support for this, such as a hard-to-get entitlement for apps like yours.
Topic:
App Store Distribution & Marketing
SubTopic:
General
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