You can sign up for the beta here: Join the beta - Try new features before they are officially released
You can also download the latest version from APKMirror:
Phone/tablet: Download Hue Essentials APKs for Android - APKMirror
Android TV: Download Hue Essentials APKs for Android - APKMirror
Wear OS: Download Hue Essentials APKs for Android - APKMirror