That’s contextual, not conceptual. That means the menu contains selections relevant to whatever object or screen element you right-click to get the menu. Right-click the scene tab for the scene in question to get an Update option for that scene. If you right-click something else, you won’t get that menu pick, because it’s context sensitive.
I think perhaps you’re still missing the point. When you click a scene tab, it displays whatever visibility regime was in effect the last time the scene was updated. Any visibility changes (like making something hidden) made after that last Update will be lost. So, you hide the object, then update the scene to incorporate that (hidden) visibility state into the scene definition.
Failing to update the scene to capture the change in visibility is just like making a change to a word processing document then exiting the program without saving. The next time you open the document, it will not include the change.