The statement is accurately supported by a March 3, 2026, report from Nikkei Asia titled 'BYD redraws global EV map, overtaking Tesla in 20 markets.' This report confirms the specific figure of 'more than 20 regions' and the 'five-year' timeframe mentioned in the claim. Broader industry data from the New York Times and Statista further corroborate BYD's ascent to the top of the global EV market by early 2026.