When you are in your Scandinavian Town there is a round little picture at the right side of the screen that leads you to the Egyptian town. And vice versa.

The only problem is that when you are fresh in Scandinavia, you don’t have the town from the start. (Unlike in Egypt). It comes only after some locations. But then you will be able to return to Egypt and finish everything.
Also the new repeatables open up only after finishing some locations as well, so just go on with them and explore what opens up to you.
I hope you are aware that the tiles in Scandinavia are 6x more expensive than in Egypt. You get bigger rewards and can get stronger equipment though, so don’t despair. The start is worst, then it gets better 😊