I'm completely out of the loop on this, but thanks to a YouTube suggestion, I found out today that there's a Portuguese American Football Federation. The Federation was only created in 2009, but they've been having games since 2005, and they're a member of the IFAF.
International Game
On May 17th, Lisbon will host the first American football game between a North American and a Portuguese team.The university of Wheaton, in the State of Illinois, will come to Portugal with a delegation of more than 100 people, to face the best Portuguese players, who will be selected based on their performance in the Portuguese American Football League, in the 2024/25 season .This will be a historic day in the history of the sport in Portugal.
The game ended 0-54! That was epic! I've never seen them play, but I ride for the Porto Renegades!