Please explain more.
I'm actually not going to give my thoughts in full if that's OK, because I'm too lazy to summarise 80 years of scholarship in a MN post, and also because it's been 30 years since I started my DPhil on the Mistress of Beasts (Potnia Theron) and I didn't finish it, because I turned out not to be clever / resilient enough to finish a DPhil.
But basically it used to be thought that hunter gatherer societies were matriarchal and worshipped fertility goddesses, the Venus of Willendorff was always pulled into this. That's where the Potnia Theron came in. And then, the thinking went, as societies transitioned to agriculture, they became patriarchal and started to worship male gods. And people would say all sorts of things like you can see traces of this in the Gilgamesh epic (Ishtar journey to underworld - the shepherd scenes) and in the Hera-Zeus dynamic in Book 14 of the Iliad and all that stuff. It was also thought that you could draw a fairly straight line from the Potnia to Ishtar, Inanna, Artemis, Athena, Hekate, blah blah blah. Walter Burkert and Mircea Eliade were the best known proponents of this (although Eliade was always seen as a maverick and a bit unserious in academic circles), also Martin West East Face of Helicon? Anyway, say in the last 30 years postcolonialism has taken off and that whole way of thinking is now regarded as a very reductive and western centric way of looking at things, I mean sure cultures interact, and West and Lane Fox are very good on the dynamics you mention (Lane Fox's book on the Greeks' Western colonies and how this influenced Homeric epic is AWESOME) but the idea that one thing turns neatly into another is seen as very very simplistic and kinda patronising if that makes sense.
With Sappho - I don't know if you know Greek and so I don't know if you've read the actual fragments or just seen the translations. The fact is that the Sapphic corpus as it is in the original Aeolic Greek is so fragmentary and disputed that it's impossible to know what or who she was. They may've been love poems to other women, they may equally have been lyric songs to teach young aristocratic girls how to sing and dance (an important part of civic society in that place and time) and that's why they were praising each other. I prefer to see her as a lesbian (and Lesbian!) poet but I also know that concepts of sexuality back then were so different to what they are now, and we really know so little about female initiation and socialisation rituals in 7/6 C BC Lesbos, that it's impossible to say for sure. I also personally think that a lot of what we THINK we see in Sappho's poetry is actually backformed from Catullus if that makes sense?
Anyway, as I say it's been a long time since I've read / researched academically in these areas and I am sure someone cleverer and better informed than me will be along shortly to correct me and update you with some more useful info!