The letter T represents the Ts in LGBT+ acronym, sometimes called LGBTTT+. It groups any trans* identities, such as transvestic, transsex and transgender, with any other identity starting in T, such as trigender, travesti, two-spirit, and third-gender.
The letter is important for transemphatic people, for example.
History
The term was conceptualized by arco-pluris via Tumblr on April 9, 2019.[1]