In 2002, Sergey Karjakin from the Ukraine became the world's youngest chess Grandmaster at what age?

Question

FIDE organised an international championship first held in 2019, followed by an Intercontinental Online Chess Championship in 2021 and onwards, for whom?

Answer 1

12 year 7 months
In 2021 he still holds that distinction. Karjakin won the European U10 Chess Championship in 1999, and was World U12 Chess Champion in 2001. (Magnus Carlsen, the World Champion in 2021 was named Grandmaster at 13 years, 4 months, 27 days.)