Edit: After half day, my wife’s Mac started having the same problem. I have then applied the solution that I found in the Apple
TV Shows & Movies Disappear For Apple TV Users
We have had many off you report to us that both or one of the Movies and TV Shows icons have disappeared from the Apple TV interface for users in the UK, Ireland and France.
Apple has reportedly said that they are aware of the issue and that restoring the Apple TV would fix the issue but it has not worked for the majority so we contacted Apple and they said :
We are currently upgrading our servers and the icons should appear again soon