Idk what the projects about, but if you need some help here are some interesting flag facts:
If you notice every central american flag looks very similar, with blue on top and bottom with white in the middle with some symbol or stars or sthm, and this is because they all were based on the Federal Republic of Central America's flag, which was based on the Argentinian flag. When the country broke apart, this caused for there to be a ton of central american countries with similar flags
If you look at the flag of Romania and Chad, you'll notice that they are basically the exact same. There's a bunch of videos like this which talk about it but basically every country that used be a part of the eastern bloc (ussr version of nato, but more puppet states), took the emblem off their flag which represented communism, but chad's flag was already set in place so they have the same one now.
A lot of african countries use the sameish color scheme, because they were all based on the old flag of ethiopia. During colonization, almost all of africa was colonized except for ethiopia and liberia (liberia is debatable, was kinda under the US's protection), so a lot of the countries when they gain independence used inspiration from ethiopia.
Indonesia and monaco have very similar flags as well. This is because Monaco adopted their flag way before indonesia got independence from the dutch, but the indonesia flag was based on the "Majapahit Kingdom" which based theirs on the "Jayakatwang of Kadiri Kingdom", so when monaco asked indonesia refused to change it
Thank you for the facts! One of my topics would've been similar colour/design trends in nearby countries so if I end up doing flags this stuff'll come in handy. :)
As for the project itself, it's open-ended, we get to choose our topic. Those are the two I narrowed it down to