Work is actively underway to add naked domain support with an automatic renewal flow to App Service Managed Certificates. There have been some snags getting the auto-renewal flow working. We understand these kinds of delays are frustrating, but rest assured the feature is being worked on and is coming in the future.
-Azure App Service Team
An error occurred while saving the commentAmir Nazem commented
I've created ANAME(DNS flattening) for our naked domain and pointed it to our frontdoor but it doesn't work! very cheap web hosting provider had this feature. is there an ETA on when this would be available?