As of my knowledge cutoff in October 2023, there are no reports indicating that South Korean President Yoon Suk-yeol has faced an impeachment trial or arrest. President Yoon assumed office in May 2022 after winning the March 2022 elections and continues to serve as the nation’s leader.
South Korea has a robust democratic system with checks and balances, and any significant developments such as a presidential impeachment would be widely covered by international media outlets. If there have been recent events or updates beyond October 2023, I recommend checking the latest news from reputable sources for the most current information.
Reference(s):
S. Korea's court holds 5th hearing of Yoon's impeachment trial
cgtn.com