The only two I have tried are IsThisCanadian? and Buy Beaver. The former is AI powered and often either entirely incorrect or gives contradicting information, and the latter is community-driven and is missing a lot of data on many products.
I mostly just use the Wikipedia app and quickly check the background info on companies as I encounter them, looking up their subsidiaries and such.
There are. Heaps of them.
The US is just a big place and very spread out. And the ruling government and its media conglomerates are trying to keep them out of the media.