When I go to the Play Store in my Android TV box and look for the Netflix app, I see that the last update arrived on march 31st 2022 but when I go to the Play Store website , the last update is dated august 31st 2022.

There was a previous update that didn't arrive either.

Is the Play Store failing to update the app?

Something similar happened to the Play Movies and TV app, which it wouldn't update until Google fixed it up on the server side.