Regarding hydraulic jacks: the US Jack long chassis floor jacks are made by Weaver. The US Jack regular chassis floor Jack is imported. Other than Weaver, there is also Milwaukee Hydraulics, and Gray. And I’m going to be nit picky with the “current” Hein Werner ... their 4 and 10 ton jacks are USA, while the 2 and 3 tons are the ones that are “assembled in USA with USA and global components”. If you really have the curiosity, you can look at the individual part numbers of the Hein Werner 2 and 3 ton jack components and figure out what components are USA and what parts are imported.
As for jack stands, I think you’ve got US Jack and Gray as USA made. The Hein Werner Pin-style stands are still USA made, its the ratcheting-style stands that went to “assembled” status.