Micronations have varying levels of seriousness. Some are going on to this day, holding elections, having there own currency, government etc. Some even participate in intermicronational organisations. However, a lot of micronations, are less serious, or defunct. They might exist entirely online without any serious territorial claims, or might rarely be active, or dead.
If you want your micronation to have an article on the site, you need to at least put some effort into making the micronation, and if possible a get a lot of people to participate in it. You can always write your own article on a micronation, as long as it follows the rules of the site.
If you'd like to learn more, I recommend you search up information yourself, as I can't explain every aspect about micronations myself. I also recommend you read this article: https://micronations.wiki/wiki/Micronation .