@Jeffrey De Meulemeester I have added couple of OpenAI connections in my AI studio and shared them to all projects and they seem to be available in the dropdown.
I think you can try adding them directly in raw file mode and check if that works.
In raw file mode, an llm should like below along with other components that you have added. The provider should be AzureOpenAI and connection should be your connection name.
If you are unable to use the same after trying above options, you could try reaching out to Azure support by raising a case from Azure portal. Thanks!! I hope this helps!!
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