The inclusion of "T" in the acronym (formerly just LGB) became standard in the 1990s and 2000s to recognize the shared struggle against heteronormative and gender-normative societal pressures. LGBTQ Community | Definition, Meaning, & Flag - Britannica
: An umbrella term for people whose gender identity differs from the sex they were assigned at birth.
: Being transgender does not dictate sexual orientation; trans people can be straight, gay, lesbian, bisexual, pansexual, or asexual. The Transgender Community Within LGBTQ+ Culture