I've checked out a little bit of her material.
I don't know how familiar you are with certain areas of modern black culture; but there has been a sharp uptick in "feminine empowerment" (I'll just call it that for lack of better words) on top of the last few decades passed down to black women (which was by no means insignificant for many). It has manifested in the form of all natural self care (which I think is good in and of itself), love for body, no shame with sex and with the feminine figure (again on their own I don't personally believe that these are bad things, so long as they are serving in their place), rebellion against "white supremacy", saging your house, yoga, "mindfulness", and other things.
But where I'm interested/alarmed in all of this is that they have catch phrases such as "the black woman is god", "black women are magic", "black women are goddesses", "black women are true women", and such. Again, I'm not sure if you're familiar with it... But a lot of young black women are adopting this mindset of culture into their lives, so it's readily observable on instagram or facebook. It comes with a lot of mystical/magical, pagan types of philosophies and religious undertones. Some aspects aren't even undertones but are blatant.
My point in detailing of this is to say that while Beyoncé is a pop icon, her sister more fits into the type of artsy singer this group is attracted to. She's even got a lot of far left SJW rhetoric she doesn't hide. She appeals to the intellectual black women, sjw types, new age, or however you want to describe mostly millennial black women who want to get into touch with their African heritage, mixing it with American.
I have no proof but also no doubt that she is probably practicing witchcraft right alongside her sister, but I just wanted to know if anyone else observed these things.