Yes, Sasha Allen on the Voice was a girl but later identified him as transgender. He was afraid for many years and got fed up and came out as trans in the freshman year of high school.
Additionally, Allen was scared of coming out due to bullying from students and teachers. When he came out as transgender, many people supported him, sending love online.
Furthermore, Allen was proud to represent the LGBTQ on such a high-profile show, The Voice.