Sure, if it's a marginal cost increase or if you're wealthy.

But middle-income families typically aren't going to spend 25-50% more on a comparable product to save on CO2.

There was a big push decades ago to buy American, but it largely failed because for the majority of people living paycheck to paycheck, spending 25-50% more to have an American flag sticker on your purchase wasn't worth it.

Also because there is 0 accountability that the flag sticker is honest. Sometimes the only part that's "made in USA" is the effort of applying the sticker.

My partner and I are a middle income family (though comfortable because we live cheap) and we buy based on a bunch of factors including brand loyalty and environment policy (as much as you can find out without it turning into a full time job).