Alas, I'd prefer a USA-built folder too.
I'm sure it would be a HUGE capital investment for Kabar to start making folders in-house. Without clear projections that it would pay for itself in a reasonable term and a plan to commit many designs to domestic production, they'd probably have to sub it for a one-off USA-built design. I'd pay $100 for a Kershaw-made Becker folder. And a little more for a Spyderco-made one. I don't know if the big names do private label stuff, and if Kabar considered sub-contracting it domestically beyond the Hogue prototype. Also don't know if Kabar owns a facility in China, or if they're just subbing it out to an existing big manufacturer there (that's my guess).
Arguably, Taiwan IS China. I'm not sure how labeling is being enforced these days. Back when I worked in corporate reference data, we had to make sure that our master record on Taiwan was "Province of China". And obviously there's a long-running dispute over all that, and I'm not taking sides. I certainly don't know how it impacts Kabar's blade markings. I do agree that a Taiwan marking would sell better.