If the application uses high amps, they might be only copper plated, but I would still check.
If there is a mask, or what is sometimes called a solder mask, a protective coating over the played metal, you might try to peel or scrape it off to better see the metal plating underneath.
It also looks like there are MLCCs on the boards, if so they almost surely will contain palladium and/or silver.
Scott
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