My understanding is that US companies who manufacture outside the US are one of the main targets.
I was reading somwthing earlier about US running shoe manufacturers, who dominate the global market but who almost exclusively manufacture in Asia, being amongst those at the very sharp end of the tariffs in the US market.
https://www.reuters.com/business/retail-consumer/us-tariffs-vietnam-would-be-blow-nike-other-sportswear-brands-2025-04-01/
But it's early days & I'm not sure anyone, posibly including those in the Whitehouse, really knows how this is going to work yet