BYD has barely started exporting cars, a bit less than 1 million last year. The total European market is 11 million cars a year. The global market is 90 million units.
And BYD obviously is focusing on easier markets, where they don't have to fight against tariffs.
BYD have also built a fleet of 8 of their own car carriers with a million car per year capacity. As well as multiple factories in multiple countries/continents outside China, including one in California (commercial trucks and bus only)