The five-year deal includes an option for an additional 12 months, securing Muniz's future with the club.
In a statement, Muniz expressed his gratitude to God, the club, and his loved ones, including fans in Brazil.
He also acknowledged the trust placed in him by Fulham and his desire to safeguard his future with the team.
Muniz emphasized the importance of staying with Fulham and the feeling of security that comes with having a long-term contract.