As previously announced, Android TV releases are now in sync with the normal releases.
There won’t be new posts about specific Android TV releases, they will be available a couple of days after the phone release to avoid locks in Google review process.
The version name will have a " TV" indicator in it to be sure that your are using a TV version and not a phone version.
See Version 13.4.0 released for 13.4.0 changelog.