The flag for Mongolia, which may show as the letters MN on some platforms.
The Flag: Mongolia emoji is a flag sequence combining ? Regional Indicator Symbol Letter M and ? Regional Indicator Symbol Letter N. These display as a single emoji on supported platforms.
Flag: Mongolia was added to Emoji 1.0 in 2015.
U+1F1F2
U+1F1F3
?? Regional indicator symbol letter m
?? Regional indicator symbol letter n