This one if for controller support (consoles and PC).
When all quests are done in a kingdom, the icon should grey out so you can no longer click it. And then explore should become the default option.
If you rather not disable the quest icon, then you should still at least make explore the default icon (once all quests are done).
Because in it’s current implementation, if you click X twice, you get an no quests message that takes you back to the map screen. Yet, this is the default option?
This is just bad interface design.
Something that you click max 20 times is the default option, while something that you have to click hundreds of times, is not.