During LIMA 2023, KAI’s International Business Development Director for Asia, Sangshin Park was quoted.Either way, seems KAI give enough indication to seriously study one cockpit/single seat design for further development concept on their LCA.
"discussing the development of a single-engine version of the aircraft that would be designated F-50. This aircraft should begin development next year and would have completed that process by 2028."
Korean Aerospace Industries eyes new fighter designs, FA-50 sales in Pacific - Breaking Defense
Underpinning KAI's plan is an overall goal of reducing the company’s dependence on Korean government procurement and to increase sales in the export market.
breakingdefense.com
It seems long for a platform that is already in service. Maybe they are focusing on the KF-21, and the extensive length seem to suggest a more though refresh.