hollow shale
As seen in the pic, there are 251 entities in the scene, but they all get highlighted together? And in the hierarch, there's just a single entry.
They seem to be working correctly, just displaying weird. Is this normal and I'm just misunderstanding? If so, is there a way to inspect one entity and all its components?
sturdy matrix
You might misunderstand how subscene works. Whenever you enter playmode, your subscene is supposed to be closed, not open. This has to be unchecked.
You only open a subscene to modify it in the inspector. After that you have to close it.
Because a closed subscene is what you only have after the game is built.