Dario Antolini Thanks for posting your question in Microsoft Q&A. You are right, for languages such as Python, Java (other than C#), we currently support OpenAPI integration through API Management as described in Expose serverless APIs from HTTP endpoints using Azure API Management.
For C#, you can use azure-functions-openapi-extension to create swagger but unfortunately, Python is still in the roadmap (similar discussion: Looking for a Python version). If you are interested in this feature, I suggest you submit feedback via https://feedback.azure.com/d365community/forum/9df02822-f224-ec11-b6e6-000d3a4f0da0 and others with similar interests can upvote it too. This will help our product team prioritize the features.
I hope this helps and let me know if any questions.
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