Photos not syncing in apple tv
I use Photos on my MacBook Pro. I have iCloud with 2Tb of storage. I have Apple TV+ and notice that Photos have stopped syncing since October 2021. Meaning any photos after that date do not appear in the photos App on Apple TV. My MacBook Pro, iPhone SE and iPad all sync okay.
All products fully updated. tvOS 15.5.1.
Photos database is on an external Lacie HD MacOS Extended format. Approx 450Gb database.
iTunes music app works fine. Apple TV+ functioning fine apart from the Photos app.
As far as I can see all are setup correctly.
I'm assuming this is something self inflicted in October 2021 but I cannot think what. Or is this a previously reported issue?
Any thoughts would be appreciated.
Regards
Apple TV 4K, tvOS 15