Repeating my comment. That is not how this works.

Governments ask for something like a metal spectrometer analysis of components. They might even say each batch needs to be analyzed and we trust analysis from spectrometers manufactured and/or operated in US. Each condition raising the price for certificate/analysis even more.

Or directly from the post

> U.S. customs is demanding a Certificate of Analysis (which could cost thousands of dollars and to determine what exact amount of Aluminum, Copper and Steel are in the product), otherwise they assume the entire PCB consists of copper, aluminum, and steel, and charge a 100% tariff on the whole product.