Apple implements the international standard for Unicode including the flags included with the Unicode standard and referenced standards, so you will want to read this document from the Unicode committee:
https://unicode.org/emoji/proposals.html#Flags
In particular, this: The Emoji Subcommittee and the UTC will no longer accept proposals for flags
This flag is the south of Yemen flag
you guys have North Yemen 🇾🇪 flag now you need to put our flag
South Yemen, officially the People's Democratic Republic of Yemen, also referred to as Democratic Yemen or Yemen, was a socialist state that existed from 1967 to 1990 as a state in the Middle East in the southern and eastern provinces of the present-day Republic of Yemen, including the island of Socotra
I want to add a flag for the emoji keyboard
