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The Adobe Photoshop Lightroom CC for Apple TV app allows you to view your Lightroom cloud photos, videos, and Albums and enjoy slideshows on your TV. If you make any changes to your photos or Albums in Lightroom CC on your desktop, mobile, web, or Lightroom Classic CC desktop, while the Lightroom CC for Apple TV app is running, the app updates to show those changes. You can swipe through your albums to quickly find the photo you’re looking for or zoom in on your photos to view every detail on the big screen.
Details: How to use Adobe Photoshop Lightroom CC for Apple TV app