I searched the micro Nations

(literally the only micro nation in hetalia that's considered a micro nation is sealand

CONGRATS YOUR A COUNTRY)

Anywho apparently there's a place

Called

The Kingdom of gay and lesbians of the coral Islands (or something like that)

You guessed it,  their flag is the rainbow

And there's a hetalia oc of it.

Not to mention this one place in canada

With a smiley face flag and the number pi on coins as currency

ITS basically American Empire without the m

*dead*