According to the Financial Times:
https://www.ft.com/content/7e9f6182-f545-4e53-9cef-1ae4f6e3bd9f
The Seoul Southern District Prosecutors’ Office said on Monday that it asked Seoul’s foreign ministry to cancel Kwon’s South Korean passport as he was “obviously on the run and has no intention to appear before us for questioning”.
“We have begun the procedure to place him on the Interpol red notice list and revoke his passport,” the prosecutors’ office said, adding that Kwon had not co-operated with investigations into his company’s collapse.
A red notice is an alert to police worldwide to locate and arrest him, and extradite him to South Korea.
It was thought he'd gone to Singapore, but Singapore police say he's not there.