It would be super helpful to add a “Lock” toggle 🔒 for Scene objects directly in the Scene Hierarchy.
When an object is locked, it cannot be selected in the viewport and its transform (position/rotation/scale) can’t be edited avoiding accidental moves, especially for background / environment elements.

In complex scenes, it’s very easy to accidentally select and move large background objects (BG, skybox planes, environment meshes, ...). A lock feature would significantly reduce mistakes and speed up editing!