That's not at all true. The citizenship question was removed from the 2020 Decennial Census by the Supreme Court in Department of Commerce v New York (2019) which held the Department of Commerce failed to provide a genuine justification for the decision to add the citizenship question (as required by the Administrative Procedure Act), instead providing a contrived and pretextual explanation.

https://en.wikipedia.org/wiki/Department_of_Commerce_v._New_...