The factual accuracy of this flag is disputed. Reddit isn't a reliable source and the post doesn't give any supporting evidence. The author claims that the banner was the same carried by Muhammad, but in islamic tradition it was black not green.
Kopsavilkums
This flag is fictitious, proposed, or locally used unofficially. It has not been adopted in an official capacity, and although it may be named as if it was an official flag of a geographical or other entity and have some visual elements that are similar to official logos or flags of that entity, it does not have any official recognition. A flag of this type should not be added to any articles or pages unless it is officially proposed by a government agency, covered by the media, or sees notable local use.
AprakstsRashidun Flag.svg
English: fictional Flag of Rashidun Caliphate (631-661)
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