@Joe Deal I believe you have created a FR custom model using v3.0 version. I see a action for v3.0 for prebuilt and custom models in the connector reference page here.
I see the following is supported for v3.0 connector for this action.
Prebuilt modelIds: prebuilt-read, prebuilt-layout, prebuilt-document, prebuilt-businessCard, prebuilt-idDocument, prebuilt-invoice, prebuilt-receipt, prebuilt-tax.us.w2, prebuilt-vaccinationCard, prebuilt-healthInsuranceCard.us. Custom modelId format - [a-zA-Z0-9][a-zA-Z0-9._~-]{1,63}. Unique model name.
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