... Or maybe because
1) to be clickable they would have to be hilariously large and thus ugly
2) fortified no-dev islands don't do anything in-game anyway
3) you are joking right?
1) You mean like any of the other islands which are all massively oversized? Like The Maldives? Who were less important than the Channel Islands in every possible measurable way in this time period? Lets not even get into some of the tiny islands in the new world.
2) Jersey was highly developed in the period. With significant dealings between England and France throughout the period. Here is some of the basics:
"Fortifications against the French can be seen all over the Island.
Mont Orgueil Castle was constructed on the orders of King John himself to guard the Island's east coast. Elizabeth Castle, named after the Tudor English Queen, was built in the 16th century to defend the growing town of St Helier. And in the 1770s, the coastline was literally littered with a series of 'Martello' towers, designed to protect the Island from the threat of French invasions. These defences were penetrated by the French on several occasions.
In 1461 French troops seized Mont Orgueil Castle itself and ruled the Island from it, with great severity, for seven years*. In 1781 a French expedition landed at
La Rocque one January night and marched right into St Helier without a shot being fired against them. It was only the bravery of an English officer, Major Pierson, that prevented further French occupation."
*
This is a key hundred years war event.
3) You are joking right? The channel islands were more important to European nobility than the entire of the USA for the majority of the period, being a holiday home and point of presitege in the endless "penis measuring" contest that was English-French relations.
Anyone with a background in history could easily justifiy the channel islands as being more important than a sigificant number of Tags in EUIV's timeline, at least as far as European politics were concerned. They aren't there because they would be technically difficult to add. They are the periods
only republic to survive the whole timeline.
I mean seriously, there is an american state called "NEW JERSEY". Guess what that is all about?
They don't just name parts of america, or use it's system of 2 elected officials and a (chief minister here, but president in america) after it because it's of no importance.
The system that ran Jersey remotely for the English worked, so they re-used it in America. It's that important.