Somewhat related:
I’d like to have 2 settings:
Freezing Actors:
It is not possible to select or edit the Actor. It can be unfreezed by the world outliner.
When you select a Freezed Actor (e.g. by multiselect in the Outliner) Manipulating values won’t affect them.
For example you have a blueprint where you exposed a float so you can change it in the editor.
You place three actors of the same BP in the world but one of them is freezed.
You can change the float of the selected Actors, but the float of the freezed actor stays unchanged.
(maybe just make in unavailable to select them at all lol)
Locking Actors:
You may select the Actor, but you are unable to move it around.