As I understand it, with the Chile agreement, it's not enforced yet, so the committee hasn't been set up or started to run activities.
In the chapter, the language at the moment isn't specific about who that committee should be. As you say and in our experience as well, often the groups that do get access to these spaces are those that are already quite privileged. Women who own businesses and so on definitely need a seat at the table to have a voice on particular issues that face women-owned enterprises. However, we propose that, for example, labour movements that represent sectors where women are particularly concentrated should be included. Women's organizations from the particular countries that are part of the trading agreement could be included as well. Often in countries, women's organizations organize through networks. Those are often really good places to look for people who can represent a broad range of women's interests.