Eventually the protected industries will be totally disconnected from global markets causing them to lose global competitiveness, to the point they cannot even compete with the black market markups. And then you are maga, er mega, fucked.
What markets do you have in minds? Can retail investors invest there?
So basically, everywhere else, proportionally. Even markets that have worse import/export restrictions, will still have relative changes in their attraction.
For a rough approximation non-US world index ETFs, which are available to retail investors.