Do some research then. It's not impossible to figure out where things are coming from.
Sadly, it’s not realistic to expect people to spend 3x their normal shopping time. We need to make it easier to identify, either through government action, or some commercial solution.
I was trying to buy headphones from a market chain the other day and all the models in 100 eur range were made in china. With some having designed in xxx and made in china.
It actually is impossible for most people for a lot of products. It would be much better to pass something like the PRIME Act[1].