www.theguardian.com/commentisfree/2022/jan/10/black-british-ivy-league-university-london-accent
This article gave me a huge sense of relief, almost like a burden has been lifted.
I haven't been overseas since 2019, but my experience was until I opened my mouth, people assumed I was either American or from one of the African countries. And then I was asked to repeat certain words & phrases for the amusement of the person making the request.