As of October 2023, there are no reports indicating that South Korean President Yoon Suk-yeol has been impeached or faces an arrest warrant. President Yoon assumed office in May 2022, and no such events have been covered by reputable news sources.
For the most accurate and up-to-date information, it’s recommended to consult trusted media outlets.
Reference(s):
Stringer Dispatch: South Koreans take to the streets for Yoon's ouster
cgtn.com