Italian handbags are a great example. 99% of luxury brand handbags are made in China, from a few hundred dollars ones to thousands of dollars.
Those bags are shipped to Italy, without accessories (like zip locks or metal clips, or logos) as generics. Then locks are stitched in and dada, you have a "made-in-Italy" handbags.
That's really purposeful deception,
I think it depends on your definition of "made-in". To me, where most of the value-add activities taking place is where the product is "made" - I cannot care less about where it is assembled or where the parts come from, like engineering or r&d.
So by that definition, an iPhone is made in the US, and those italian handbags are made in Italy, and I assume the same for your microwave oven.