Set an attribute to all objects of same type

The thing is I have an object, which exists in all layouts, and there are almost 100 layouts now, along with many of these objects in all layouts.

Is there a way to set some attributes and apply to all objects? For instance, I want to change the opacity of every object of the same object type in every layout, how can I do that?

I think you can do it from the project window,

first open an empty layout,

then select the object in the project/object window,

then change the parameter accordingly,