Your mod looks good, but the flag used in game is not a lore oversight; it's a visual shorthand, the equivalent of Dorothy saying "Toto, we're not in Kansas anymore" in The Wizard of Oz. They use a different flag to show us we're in a different world.
In the Fallout universe, the Usa literally went throgh a lot of wars before 2077, the states are very different and i think places like parts pf canada or mexico are under american control. Not to mention that is implied that the Soviet Union still exist and China is a second Soviet Union.
Remember thatFallout not only happens in the future, but in an alternative timeline.
Also, this isnt't a "Fallout 4 bad because look, wrong flag" This flag appears since the first two game, along with the enclave flag.
This is actually wrong sadly. In the fallout universe in 1969 when the 13 commonwealths were created, the flag changed as well, having 13 stars and 1 for D.C
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Wait a minute!
Remember thatFallout not only happens in the future, but in an alternative timeline.
Also, this isnt't a "Fallout 4 bad because look, wrong flag" This flag appears since the first two game, along with the enclave flag.
So lore-friendly or a joke, I don't see how it can be both in this instance 😅