It is not always possible to know the identities of all the authors you cite in your work. There are also different aspects of identity that can intersect and impact the lived reality of a person (e.g., race, sexuality, gender expression, disability).
Some publishers are moving to include demographic data by requesting it be provided when an article is submitted or before it is published. The journal Health Affairs reflected on an article from The New York Times about this issue:
"...although some of the most prominent health-related peer review journals had issued statements in support of increasing racial diversity, only two collected information on authors’ demographics relating to race and ethnicity. Collecting such information is important. It can reveal disparities in who is submitting and publishing as well as who is being asked to serve as a peer reviewer. Without such data, unconscious racial biases when selecting individuals for editorial board positions, commissioned writings (e.g., editorials, commentaries), and other journal-sponsored activities can remain hidden."
Source: "Tracking Author Demographics To Increase Equitable Participation", Health Affairs Forefront, January 11, 2022. DOI: 10.1377/forefront.20220111.391624
There are some tools that can help you count and track how many of your citations are from authors of historically marginalized communities. These are not perfect, and can be problematic where they use data to identify members of a specific community. For example, tools that purport to provide information on the gender of an author based on their names may use data that is weighted heavily towards frequently-occuring Western names. Citations may also only include an initial for a first name, meaning that a user may need to do further searching. Some authors may not wish to disclose aspects of their identity.
Citation Transparency Google Chrome Extension