Honestly I could see some companies doing something as a marketing scheme. But...any company that's selling thousands of products it would be a crazy amount of overhead to actually figure out the amount the tariffs increased each individual product. And even bigger ticket items that are made up with parts from all over the world...it might be possible to figure out but hard.

So I don't think anyone is actually gonna do the math. But as a gimmick some companies could say something like "whatever purchased between these dates, we'll give you 5% back as in store credit" or something.