I’m sorry, but I don’t have any information about South Korean President Yoon Suk-yeol’s chief of staff and senior secretaries offering to resign all at once. As of my last update in October 2023, there are no reports of this event happening. It’s possible that this news emerged after my last update. For the most recent information, please check a reliable news source.
Reference(s):
Yoon's chief of staff, senior secretaries offer to resign en masse
cgtn.com