It's a proud evening for me but a disappointing result," Scanlon told the Gibraltar FA's website.
My goals from here are to just keep progressing with my game and to have a big impact in whichever team I play. I think that's a good aim for me."
Kobbie Mainoo, 18, also made his full debut for England in last night's 2-2 draw with Belgium.
This is a huge landmark in the development of both players that should be celebrated," Nick Cox, United's director of Academy, told manutd.com.
We always encourage young players to dream big, knowing that the bigger the dream, the harder they will have to work to fulfil it.
These two young players and many others in the first-team squad here and elsewhere have achieved the biggest of dreams, to represent their country. There is no greater achievement than playing for your nation.
All the staff at the Academy are very proud of what these boys are achieving. As we always tell our kids and their parents, it's our duty to facilitate them maximising their potential, whether that's playing for England or finding success elsewhere in the game or in life.