The Seagull, maybe not. But BYD already own the EV market in other countries with strict safety restrictions such as Australia, selling their pricier models. Price wise these are still comparable only with other Chinese manufactured cars such as Ora and MG. It will be the same in the US, without trade restrictions getting in the way.
The expert quoted by the AP says changes to allow homologation for road use in US would only add a couple thousand dollars to the price tag. Unless your definition of "cheap" is extremely narrow, you might want to read TFA to get an understanding of why this vehicle is so inexpensive.