From what I read ETIAS is valid for 3 years or until passport expiration date, whichever is the earlier. When applying, we have to mention the first country we intend to visit.
Do we have to enter that country first when we actually travel?
Let say, we plan to fly with Iceland air to Milan with a transfer in Reykjavik. Does this mean Iceland is the first county to enter? What if we end up flying with different airline with a transit somewhere else or a direct flight?
Since it is valid for 3 years, do we have to stick to the same "first country" to visit, if we plan to go to Europe the following year?
Thanks,