This shouldn’t be terribly surprising that the ROK President was against the deployment of USFK assets to assist with the war against Iran:

President Lee Jae Myung said Tuesday that a potential relocation of military assets owned by the U.S. military stationed in South Korea will not affect the deterrence posture against North Korea.
Citing media reports that the U.S. Forces Korea (USFK) might have recently shipped out some weapons, including an anti-missile defense system, Lee told a Cabinet meeting, “If you ask if our deterrence strategy against North Korea is severely affected (because of a possible shift of such assets), I can say absolutely not.”
The remarks by Lee did not explicitly comment on the possible movement or repositioning of USFK’s military assets.
However, South Korea has expressed its opposition against USFK’s possible shift of its military assets, but it is a “stark reality” that South Korea’s opinions would not be fully accepted, Lee said.
“Our government expects the USFK to fully contribute to stability and peace on the Korean Peninsula, which I believe it has done so far,” Lee said.
“Depending on how the situation unfolds, however, the USFK may dispatch some air defense systems abroad in accordance with its own military needs. While we have expressed opposition, the reality is that we cannot fully push through our position.”
You can read more at the link.









