This article lists quite a few sword-and-sorcery books that the author viewed as feminist:
- The Birthgrave by Tanith Lee (1975) along with two sequels
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This world has an early medieval culture with “decadent imperial civilizations,” small city states, nomadic groups, constant little wars and skirmishes and conquests, swords and primitive cannons, multiple religions worshipping various deities, and powerful but mysterious magic.
Wikipedia -
...the majority of the book is about women, their interactions with both men AND women, and their impact on Vazkor’s social status.
from the linked article - Note that these are also science fiction, so they might not count as "sword-and-sorcery" according to some
Additionally, there are the Sword and Sorceress anthologies (emphasis mine):
...Marion Zimmer Bradley...created the anthology to redress the lack of strong female protagonists in the subgenre of sword and sorcery.
TL;DR there are definitely sword-and-sorcery works that are feminist or described as feminist.