As a midwestern white American, I've certainly had prejudices based on people's accents, and I've probably misjudged whether someone was a "native" speaker. Having read this article, I will renew my efforts to fight those ugly prejudices.
For a few years now, I've thought that the ideal work environment for encouraging diversity and inclusion would be an all-remote team that used only written communication, preferring asynchronous communication as much as possible. One advantage of such an environment would be that people like me couldn't judge others based on their accents. But then, I'm not ready to actually go to this extreme in my own work. I'm the cofounder of a tiny company, and my cofounder and I have several spoken conversations per day. I don't think either of us want to change that. Perhaps I could limit myself to written communication with any employees that we hire, but that feels like a double standard.