As of my last update in September 2021, there is no information about South Korean President Yoon Suk-yeol being impeached or Choi Sang-mok becoming acting president and being investigated by police. It’s possible that this information is recent or not widely reported. Please check reliable news sources for the most current information.
Reference(s):
South Korea's acting President Choi Sang-mok investigated by police
cgtn.com
