GPT-5.5-Pro not listed in foundry?

The model is mentioned in this blog post :

https://azure.microsoft.com/en-us/blog/openais-gpt-5-5-in-microsoft-foundry-frontier-intelligence-on-an-enterprise-ready-platform/

But it is currently not listed on Foundry. Only latest pro model is 5.4-pro. When will 5.5-pro model be available on azure foundry?