You'll be happy to learn that Unicode does not have one codepoint per national flag. It has 26 codepoints that form a special alphabet that two-letter country codes can be written with, and those are conventionally rendered as national flags.

I could give a shit about codepoints. Multilingual text is hard enough as it is. The icons-with-combiners were an unnecessary complication. The site we are commenting on rejects them, and rightly so.