That article doesn't even mention nonresident importers (NRIs). The percentage that are NRIs is not public information but it is believed to have grown during this trade conflict.

What got my attention on this was this HN comment by rstuart4133:

"There are Non-Resident Importers, which are foreign companies that import goods into the USA, but do not have a presence in the United States. About 15% of USA imports come through NRIs. For them this reversal sets up a true irony. Trump effectively forced US citizens to pay more the imported goods. He thought that money would go to the USA treasury. Now the US treasury has to pay it back, so it is a free gift to the exporting countries. Like China. Truly delicious."

We have Chinese businesses that are domestic importers.

(To some extent, this was to facilitate tariff fraud. As an American business buying abroad, your foreign supplier would take over responsibility for importing into the US, and then you could pretend you were unaware it was fraudulently undervaluing its imports to lower effective tariffs paid. Any possible consequences for the foreign entity getting caught doing fraud are minimal.)