Since you list having things printed in the US as a big concern, you might want to check your WotC produced titles individually. Going through our collection just now, our DMG, Tasha's, Xanathar's, Monsters of the Multiverse, Ebberon, Hoard of the Dragon Queen, Volo, Sword Coast, Princes of the Apocalypse, Essentials Kit, Creatures Campaign Case, and Spell Book Cards Ranger were all printed in China.
I had thought they were all printed US like the PHB until I checked.
Note: Edited to indicate that the country they were printed in.