Hello @Michael Amjadi ,
Welcome to the Microsoft Q&A platform.
The Azure preview portal is for preview features of the portal and not specifically for previews of new Azure services. Previews of new Azure services should show up in both portal.azure.com and preview.portal.azure.com normally.
- Azure portal public: https://portal.azure.com/#home OR https://portal.azure.com/?feature.customportal=false#home
- Azure portal preview: https://preview.portal.azure.com/#home
Hope this helps. Do let us know if you any further queries.
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