Look at the lakes on AIS, and the maritimes. They surprisingly have ships even sailing coastwise roro! Yes I know only one Irving (actually kent lines to be specific) ship is Canadian flagged and not necess, but they have several JJ Ugland shuttle tankers, all the desgagnes, more than you think. Not big and impressive, definately not. It’s an example that even here in North America the idea of requiring coastwise crews be local isn’t out of reality.
I need to read up more, but I am sure there are plenty of other countries that are the same.