From The Williams Institute, UCLA School of Law:

"Using primarily government sources, this study examines the removal of sexual orientation and gender identity (SOGI) measures from federal data collections in the first year of the second Trump administration.

"Hundreds of federal surveys have removed SOGI questions in the last year. Measures of gender identity accounted for the vast majority of removals.
Most removals were made through non-substantive change requests rather than the notice-and-comment process."

See the report online.