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What you have circled is not the world outliner, it’s the components tab of the details panel; the world outliner does update, the components tab does not. If you need to see an array of components on the actor, make one and make it editable, that way, it shows up and updates in the details panel.
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I get what you mean by the editor freezing and not letting you select anything. That’s because the frame hasn’t been completed or rendered yet, meaning there’s nothing to show. Keep in mind, when you hit a breakpoint, you are freezing the game mid-frame while it’s still being processed.
If you do it on the first frame, the screen will be black because nothing has been rendered yet:
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Why are you afraid to add prints? Prints are what are used to debug programming everywhere; they exist literally for debugging, and print string in unreal is literally meant for the sole purpose of debugging, which is why it has that yellow construction tape that says “Development Only” on it (and has the option to print to the log), which means it only runs in development builds.
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