Kindly note that this feature Microsoft lists is powered by Sharepoint (integrated with Teams), I would recommend posting in the Sharepoint forums (by adding the Sharepoint related tags) for better support.
Thanks for your understanding.
From your description I suppose you are sharing a single list within several channels.
I tested in my lab and it behaved the same.
To me it should be expected as the view setting is modified on the list in Sharepoint, the default view change would be inherited by channels which add a tab linked to this list.
Thus in this case I am afraid it may not be possible and you may need to create additional views for each country.
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