Are nested repositories supported in Quay.io?

Issue

• When trying to push an image to an existing Quay.io repository, being via Podman or Docker, error messages similar to the following are shown:

  $ podman push quay.io/username/repository/myimage:latest
  Getting image source signatures
  Error: Error copying image to the remote destination: Error trying to reuse blob sha256:30adffdbd3882097f1def4db141084cc4563780c00646e8063ecefd300d51903 at destination: unexpected http code: 400 (Bad Request), URL: https://quay.io/v2/auth?account=username&scope=repository%3Ausername%2Frepository%2Fmyimage%3Apull%2Cpush&service=quay.io
  
  $ docker push quay.io/username/repository/myimage:latest
  The push refers to a repository [quay.io/username/repository/myimage]
  5328053e93ea: Retrying in 1 second 
  0804b3644b85: Retrying in 1 second 
  30adffdbd388: Retrying in 2 seconds 
  name invalid: Nested repositories are not supported. Found: username/repository/myimage
  

• By default, Quay.io do not create nested repositories. But the Red Hat Quay 3.6 Release Notes documentation says that support for nested repositories and extended repository names has been added. Is the same support added for Quay.io?