I hope President Yoon is ready for disappointment because North Korea is not going to denuclearize. Why would they? The best he can hope for is that North Korea pretends to denuclearize in return for economic incentives:

President Yoon Suk-yeol took the oath of office Tuesday, vowing to rebuild the nation on the foundation of a liberal democracy and market economy and offering to revive North Korea’s economy with an “audacious plan” should it take steps to denuclearize.
In his inauguration address at the National Assembly Plaza, Yoon outlined various challenges facing the country and the world from pandemics and rearrangements in global supply chains to record-low growth and rising unemployment. (….)
“While North Korea’s nuclear weapon programs are a threat not only to our security and that of Northeast Asia, the door to dialogue will remain open so that we can peacefully resolve this threat,” Yoon said in his inaugural speech.
“If North Korea genuinely embarks on a process to complete denuclearization, we are prepared to work with the international community to present an audacious plan that will vastly strengthen North Korea’s economy and improve the quality of life for its people,” he said.
Yonhap
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