If you create a child flow that use a HTTP premium connector to call a Azure Function Web API. The account that is creating the child flow needs a premium connector license. It seems that users without a premium connector license can use a parent flow (approval flow from SharePoint) to call the child flow without a premium connector license. Does all users (M365 E5 license) using a parent flow to call this child flow using a premium connector need a premium connector license?
If you are per user license. If the flow is running as child or as top level, the user running it needs to be properly licensed.
The other options is to use per flow plan for child flow.
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@Rahber Thanks for the information, its very hard to find the proper details around this topic. Have you any links to Microsoft documentation description this license requirement ?