I assume you can only view iCloud Photos and shared albums and not iPhone camera roll? Reason is I share with family in other rooms so I assume only gives access to music and films rather than notes or photos ect?
If you want to view ALL photos- including those on your Mac that are not taking up iCloud space, use the (orange icon) Computers app that comes stock on every AppleTV and turn on home sharing to share all photos (or just select albums) you like with AppleTv...
The Choose button next to that entry will let you select specific photo albums or all photos. No iCloud or iCloud subscription required.
IMO: Computers (app) is also the BEST app for your own music collection, your own movies, TV shows and home movies too. It's often overlooked but probably BEST for owned media. For my FAM, it's the second most used app on AppleTV.
My Photo Stream shut down on 26 July 2023. If you already have iCloud Photos enabled on all of your devices, you don’t need to do anything else – your photos will already be uploaded and stored in iCloud.
If frozen on AppleTV, pull the plug, wait about 30 seconds, plug it back in.
If frozen on Mac, force quit the app and reopen. If it freezes again, restart the Mac and try again. If it freezes again, hold down the option key as you click the Photos app icon and then choose your photos library. If none of those work, reply back and we can go deeper.