They are caught up when they start outselling Tesla (or heck become available so one can actually buy one).
Great cars (which I don't think Hyundai/Kia are by any stretch of imagination, from piss-poor software to poor charging infrastructure, but let's discount this for now) can exist at great prices all they want, but if I can't get my hand on one and the 500 or so that show up once every few month get gobbled up in seconds, they practically do not exist at all.
And mind you, the disparity in production is not gonna go away any time soon. They're all limited by battery production and unless they make their own batteries, Tesla has long been in the line to buy batteries from anywhere they possibly can, as much as they can. They don't screw around.
BYD is far more of a competitor to Tesla than Kia/Hyandai have been to date.
EDIT: and Tesla is no exemption here - once they have a Cybertruck selling in competitive "numbers", it becomes competitive. Until then, Rivians and Fords are leading the pack (and I must say, beautifully).