The underrepresentation of women in the IT sector is a complex issue with multiple contributing factors. Some of the most commonly cited reasons include:

Unconscious bias: Unconscious bias, or implicit bias, refers to the stereotypes and prejudices that we all hold, often without being aware of them. These biases can lead to discrimination in hiring, promotion, and other workplace decisions. For example, a study by the Anita Borg Institute found that women are less likely than men to be hired for tech jobs, even when they have the same qualifications.
Lack of female role models: The lack of female role models in the IT sector can make it difficult for young women to envision themselves in these careers. A study by the Pew Research Center found that only 27% of girls say they are very interested in a career in science, technology, engineering, and math (STEM), compared to 45% of boys.
Work-life balance challenges: The IT sector is often characterized by long hours and a demanding work culture. This can make it difficult for women, who are often disproportionately responsible for childcare and other domestic responsibilities, to pursue careers in this field. A study by the National Center for Women in Information Technology found that women are more likely than men to leave the IT sector due to work-life balance challenges.
Hostile work environment: Some women in the IT sector have reported experiencing a hostile work environment, including sexual harassment and discrimination. This can make it difficult for women to feel comfortable and supported in their careers. A study by the Anita Borg Institute found that 70% of women in tech have experienced some form of sexual harassment in their careers.

These are just some reasons women are underrepresented in the IT sector. Several things can be done to address this issue, such as providing unconscious bias training, promoting female role models, and creating more flexible work arrangements.