Access token of an app with only functions

[Luke]

I imagine you’re running into something similar here, have a read and see if its helpful/relevant.

deliveryCustomizationCreate - function not found

Just wanted to provide an update that we are looking into a better path forward for extension-only apps to activate Functions, but are not able to provide any information at the moment. In the meantime, we recommend: using the GraphiQL app through collaborator access to run the GraphQL mutation using functionId instead of functionHandle in the GraphQL mutation