I have not seen information that BYD is significantly down in sales.
Forbes says that BYD had lower profits last year, due to intense competition inside China, which lead to lower sale prices.
On the other hand it is said that overseas BYD expects to have in 2026 sales 50% higher than in 2025.
There has been about a half of year during which the BYD sales in car numbers have been slightly less than before, but already in March 2026 BYD reported sales of over 300 thousand cars, compared with less than 200 thousand in February.
If they will continue to grow at this pace they will easily reach their target of one million and a half cars exported outside China during this year.
In any case, BYD already sells in a month about the same as Tesla sells in a quarter, and the distance between them will only grow.