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I'm not aware of any recent UI changes, But would have disabled the "Application Gateway Ingress Controller" add-on option in the Kubernetes Network tab in the Azure portal . I tried creating a cluster and check but not able to see any options or check "Enable AGIC" in networking tab
if want to enable the add-on using an existing Application Gateway and AKS cluster, then run the following command:
appgwId=$(az network application-gateway show -n <application-gateway-name> -g <resource-group-name> -o tsv --query "id")
az aks enable-addons -n <AKS-cluster-name> -g <AKS-cluster-resource-group> -a ingress-appgw --appgw-id $appgwId
this enables AGIC add-on through Azure CLI
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