You can't trust Reform at all with women's sex based rights and protections. I'm not sure there is anyone in that rag tag collection of malcontents who has given the issue any serious thought. For Farage, everything comes down to the individual's freedom to do whatever they want to do without state interference.
If they do scrap the Equality Act then that does not only impact women; it, of course, impacts every other protected catergory too ( disability, sexual orientation, marital status, age, religion etc). They would surely have to replace it with something, or else just make changes rather than scrap it wholesale
In doing any of that, though, they would be setting themselves up for years of debate and scrutiny: getting bogged down in the details of it all.