You are likely thinking of the LDS.
Fundamentalist mormon women do not use social media and are forbidden to mingle with non-mormon men... so I am unsure how you would know them. I can't even talk to them.
They are weary of me because purists are considered disfellowshiped and we are treated as though we are excommunicated without ever having been. So they are forbidden to speak to me, expressly. They could technically speak to you... they just wouldn't. But they'd actually get chastized for speaking to me.
They basically keep to themselves in closely netted communities in the midwest.
All we have here in LA is LDS mostly. (Latter Day Saints)
Unfortunate, cause I would happily welcome a fundamentalist mormon woman. Or a muslim woman.