I'm excited to say, after finding no such groups, I made my own Women's spirituality and ancient period study discord group!
I am running it, and it is for strictly women (no men, tips, etc). This discord server is by invite only, I do not have the server link posted anywhere public. Currently I am advertising it here on Ovarit, and sending PMs to people who are interested that have a post history. Members are allowed to invite women they know who are also looking for a place for strictly women.
I have categories for general spirituality with channels for discussion, thoughtful questions of the day, article links, recommended reading, herbology, and magic.
I also have categories for ancient periods and the middle ages with include discussion threads and article links as well as interesting images. These categories are for historical discussions on women, women's roles in society, interesting archaeological finds, and other historical topics.
Finally, I have a category for reenactment. This includes SMA, SCA, viking reenactment, etc. with channels for general reenactment discussion, Arts and Sciences, articles, and advice.
I am open to adding other categories and channels that vibe with the above as well.
If you are interested PM me or reply below and I will get a link to you!