Kagi remembers the region filter settings from previous sessions (which is desirable) but this isn't shown by default. The region filter status is hidden until the user clicks the Toggle Filters icon.
Use case: I'm in Australia and frequently swap between region restricted and international filters. When I start a new search session I may not remember that my previous search was region restricted, and this won't be obvious from the results. I would like to be reminded that my search was filtered.
My preferred solution would be to reveal the filter options on the results page when a search was region restricted, even if the user didn't click Toggle Features (similar to DDG behaviour). But any kind of visual reminder that the search was filtered would be helpful.