I have a feeling that this isnt another dimension maybe kaguya just transported them to a place where the shinjuu roots werent located since it seems the roots are where the zetsu are spawned from.
Thinking this way she probably ported them to another island away from the sinjuu tree locations to prevent damage from the fight. This could also explain why the edokages can still sense Team 7 if you think about it this way it makes sense because when people were taken to kamui dimension their chakra disappeared. Using that as an example maybe it was just a teleport inside a volcano where the roots werent located.
Maybe this is also where she thought was the safest place to fight it might even be the place of her battle with her sons who knows.
Seeing it all this way means there is a limit of where the roots can locate maybe the tree is attracted to places where alot of chakra or life force is located if this is the case then it would be the reason why there was people to defy kaguya in the past when she cast the I.T the first time.
Thinking this way she probably ported them to another island away from the sinjuu tree locations to prevent damage from the fight. This could also explain why the edokages can still sense Team 7 if you think about it this way it makes sense because when people were taken to kamui dimension their chakra disappeared. Using that as an example maybe it was just a teleport inside a volcano where the roots werent located.
Maybe this is also where she thought was the safest place to fight it might even be the place of her battle with her sons who knows.
Seeing it all this way means there is a limit of where the roots can locate maybe the tree is attracted to places where alot of chakra or life force is located if this is the case then it would be the reason why there was people to defy kaguya in the past when she cast the I.T the first time.