It would be the US taking a 25% cut in the form of tariffs:

“Under the scheme, Nvidia chips manufactured in Taiwan could be sold to Chinese companies if they were first imported into the United States for a security review, which would require payment of a 25% tariff under Section 232 of the Trade Expansion Act of 1962, a trade law designed to address imports that threaten national security. Then the Commerce Department would grant Nvidia an export license to sell the chips to Chinese companies.”

https://democrats-waysandmeans.house.gov/media-center/press-...

They're referring to tariffs. Full letter here:

https://www.wyden.senate.gov/imo/media/doc/11122026wydenneal...