...Reasons for take up in other countries varies - in some countries, STEM roles may be seen as clean work, when the alternatives are housework or agriculture, because traditional professions are still closed off to women. It can aso be nuanced - while there were a lot of women in engineering in the USSR, one source I read (which i'm not checking at this time of night,) claimed women were more likely to be in teaching and supporting roles, while men were still dominating the hans-on engineering work.
Here, women are more likely to be in scientific fields like psychology, biology, medicine, and less so in tech, engineering, physics. If you break that down, at least in IT, women are more likely to be found in certain roles than others. Business analysis, user experience, less systems administration, network engineering. I am willing to bet that there are similar differences when you break down other areas into narrowerer specialisms.
And all of those factors and more add up to why the datasets we use are so often based on men. Datasets need updating every now and then anyway - look at how long it's taken for dress sizes to have changed since off-the-peg clothing was introduced (as if there's any standardisation between shops in any case.) There's a cost to changing standards, when you've got machines set up for particular measurements.
I think things are changing slowly. Car seats are often adjustable up and down as well as backwards and forwards these days. Still not good for many of us, but better than 20 or more years ago. Likewise, it's possible to get work desks which can be moved up and down. There's always going to be a pay-off between made-to-measure measure and mass-produced, though.
I agree we need more diverse teams in engineering and technology. More diversity brings more perspectives, and it's better for everyone in the end. We appear to be a long way off it, despite all the effort many companies are making to encourage more women.