Changing order of Communities threads?

I now there is an ongoing thread re muting Community posts: Mute Communities subcategories by default?, but this is slightly different.

Is there any way of changing the order in which the various Communities appear?

I would think there should be two options here - either they appear in alphabetical order to everybody; or I can set mine individually so that Oceania is at the top of the list?

Is this a thing, or is it something else tied in to the new sidebar?