How do I add something from the "world outliner" to a blueprint?

I have a lot of blueprints in my level at the moment that i’d like to reference all together into a separate blueprint, how is it possible ? I’ve read that all you have to do is select something in the editor and then right click in the blueprint and then the option to reference should be there but it’s not for me.
Thank you for your time !!!

This is only possible in “Level Blueprint” , in other Blueprints you can use “GetAllActorsOfClass”

That did it, thanks !