... we’ve created an interim guidance page for producers of statistics and researchers who are currently using, or thinking about including, a gender identity question on their surveys or in their administrative data collection. It will continue to be updated as further ONS research is published on sub-national and other smaller group breakdowns of the census data.
This guidance sets out the gender identity questions used in censuses across the UK, alongside additional information and considerations users should take when considering how to ask about this topic in your data collection. ...
https://blog.ons.gov.uk/2024/12/11/developing-harmonised-standards-for-sex-and-gender-identity/
Are they trying to say there wasn't a problem with the census?