Display all GameObjects that are hidden because their scene visibility is disabled.
You can suspend the scene visibility settings you set in the Hierarchy window without changing or deleting them. You can make all hidden GameObjects temporarily visible, then reapply your Hierarchy window visibility settings.
To temporarily show all hidden GameObjects in the Scene view:
In the Scene view, locate the View Options overlay.
Tip: If you can’t find the View Options overlay, press ` to open the overlays menu. Hover over View Options to highlight the View Options overlay in the Scene view.
In the View Options overlay, disable Scene Visibility. The number of hidden GameObjects in your scene displays next to the Scene Visibility toggle if the View Options overlay is in the horizontal layout.