There's a little bit more than just pronouns in this.

The 189-page document, which is technically legally non-binding but spells out the agency’s policies on investigating discrimination complaints, says that misgendering must be repeated and intentional, not a slip of the tongue, to rise to the level of workplace harassment. In its guidelines, the EEOC also decreed that it’s discriminatory for an employer to deny a transgender person access to a bathroom they feel best matches their gender identity, even if that invades the privacy of the other workers, or, in some cases, conflicts with another employee’s religious convictions.