Sevilla Club announced the signing of a 5-year contract with the 20-year-old defender.
Although the transfer fee was not disclosed by the club, it was claimed in the Spanish press that the transfer took place in exchange for 20 million euros with bonuses.
Starting his professional career at Paris Saint-Germain, Nianzou transferred to Bayern Munich in 2020.
The young defender, who also plays in the lower age categories of the French National Team, played 28 matches for the Munich team, where he won two league championships, and scored one goal.