I'm not sure specifically about 'female brushogun fanfiction' as it might be a rather niche or misspelled term. However, for general fanfiction, websites like Archive of Our Own (AO3) are great places to start. You can search for related tags there and might find something close to what you're looking for.
If 'brushogun' is a less - known or new concept in fanfiction, you could try reaching out to fanfiction communities on platforms like Reddit or Tumblr. There are many groups dedicated to various types of fanfiction, and they might be able to point you in the direction of some female - centered fanfiction related to it. Just post a clear question about it and wait for responses from the community.
Another option is to search on specialized fanfiction search engines. Some of them allow you to filter by different criteria such as character gender. You can enter the relevant keywords like 'female' and whatever 'brushogun' is supposed to be and see if any relevant fanfiction pops up. It might take some time and patience, but it could be rewarding.
Chapter 158, "It's Time to Recruit Someone Who Understands Mysticism to Work Here", is the clearest early answer because it turns Flash Change's situation into a concrete plot event.
Chapter 120, "Jiang Li Can Actually Do Acupuncture?!", is the clearest early answer because it turns Director Sun's situation into a concrete plot event. The chapter turns that into something concrete by moving from Facing the sudden and somewhat strange request from Jiang Li,...
Chapter 106, "The Beginning of the Butterfly Effect", is the clearest early answer because it turns Butterfly Effect Thinking's situation into a concrete plot event. It opens with Thinking of this, He Yun nodded with a hint of anticipation.
Chapter 165, "Boom! Jiang Yan is actually Su Yinwan's fanboy?!", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event. The chapter turns that into something concrete by moving from How come everyone else got a solid six points, and he ended up with...
Chapter 201, "Passing the Door Three Times without Entering", is the clearest early answer because it pushes Sister Li into a new phase or setting.
Chapter 378, "What if I said I have a way to find your daughter?", is the clearest early answer because it turns Destiny's situation into a concrete plot event. Early on, He Kejun's disappearance was related to an apprentice she once....
Chapter 301, "Stealing Skills", is the clearest early answer because the violence around Jiang Li becomes final instead of hypothetical. A useful checkpoint is the way the scene starts with Old Sir Jiang was somewhat puzzled. and follows through with Now he finally found an opportunity to boast!.
Chapter 327, "Official Announcement Entering the Circle!", is the clearest early answer because it pushes Weibo into a new phase or setting. The chapter turns that into something concrete by moving from Three hours later, the shoot was over, and Shen Lan personally picked...
Chapter 313, "Grandpa, You Scared My Guest", is the clearest early answer because it turns Miss Jiang's situation into a concrete plot event. The chapter turns that into something concrete by moving from When he was brought in, Zhou Wenshu was still in a fog.
Chapter 312, "Charity Gala Invitation", is the clearest early answer because it turns Director Sun's situation into a concrete plot event. Early on, Du Sang's dinner party wasn't urgent, because it was still a month.... By the end, Why the hell didn't they send me an invite?!.