Welcome to the Microsoft Q&A Platform! Thank you for asking your question here.
We understand from your query that you are experiencing an issue where the container deployed using Azure Container Instances (ACI) on the portal does not have a public IP address or a DNS name.
I have tried deploying with PowerShell, and it's working for me. Please attempt to deploy using PowerShell. I have referred to the link you provided, I deployed Azure AI Services resource through portal and provisioned Azure Container Instances through PowerShell.
az container create --resource-group msaResourcegroup --name acimsacontainer --image mcr.microsoft.com/azure-cognitive-services/textanalytics/sentiment:latest --cpu 1 --memory 8 --dns-name-label acimsadns456 --ports 5000
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