Coverage until your return home
When your previous insurance expires before your planned return, it's important to cover the remaining period of your trip, so
https://www.globelink.eu/already-travelling-travel-insurance.html may be useful for EU and EEA residents who are still abroad. The new policy should cover all remaining countries on your itinerary and the actual return date. Before purchasing, I would also check the age restrictions and maximum total trip duration. Do you check that the new policy is valid until the actual return date?