Well, I suppose it depends on the specific interpretation of space expansion charms, which are (as ever) largely unexplained in HP canon. If they're actually a pocket dimension accessed via portal like D&D, that's one thing, but if they're actually expanded space like the name implies and most fanfic that deals with them seems to use it seems to me it would be a more complicated question.
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‎noli esse culus
‎noli esse culus