The Act in question is commonly referred to as the Equality Act which aims to prohibit discrimination on the basis of sex, gender identity, and sexual orientation, and for other purposes.
If passed, it would “prohibit discrimination on the basis of sex, gender identity, and sexual orientation, and for other purposes.” Biden has long been a proponent of LGBTQ+ rights.
Under the Obama administration, the Democrat has been a vocal advocator of the queer community. Since then, he has helped in repealing the Clinton Administration’s ‘Don’t Ask, Don’t Tell’ policy, which impacted LGBTQ+ identifying individuals who were enlisted for military service, to his open support of marriage equality in 2012.