Bourbon is regulated by the ATF in the US, not outside the US. Someone could (and probably does) buy a crapload of Bourbon, blend it off with ethanol and water, and label it as Bourbon again. This type of thing happens all over the world in countries that don’t protect Ip. It’s very rare to hear of ATF raids on material being imported into the US, but it happens (before clearing customs)
Scotch, Bourbon or Wagyu, if it’s surprisingly cheap, it’s probably not as advertised