Re: Purchased movie not showing up on Apple TV 4K box
Apple support has a couple of articles online (links below) that may be helpful:
You can: Redownload TV shows and movies that you purchased - Apple Support
eg: says:
How to redownload TV shows and movies on Apple TV and other devices
You can't download movies and TV shows on Apple TV, smart TVs and other streaming devices with the Apple TV app. You can stream movies and TV shows that you purchased. Just open the Apple TV app and go to your library.
and
See what to do if you: Can’t see the movie or TV show that you purchased?