Yes. By definition, it would be extremely sexist. But wait...there's more.
When developing worlds, it's always a good idea to work out why things have evolved as they have. For example, was magic discovered, like the wheel or steam engine, or has it always been manifest, beyond ancient memory? What makes human females different from males or even other species that they alone can control magic, what makes them unique in this regard? And, if magic is ancient in origin, and sacred to the point of establishing unique gender roles within a society, (at least for one that has evolved into a city-state or beyond), then religion would probably permeate every aspect of daily life. In fact, the current social structure would almost certainly be the result of a long history steeped in draconian religious law, giving rise to a religious hierarchy, rigid caste system (especially if only some women are magic users, or if there is a difference in ability - since it is a divinely given ability, it would necessitate a social hierarchy), and extremely restrictive and judgmental social customs, including religious courts and the elimination of heretics. Logically, to me, it doesn't sound like the men, under these conditions, would be allowed the autonomy to run daily matters, beyond the role of labor. If the men in this society are significantly stronger and more prone to violence, as human males have been, how do the women maintain power, or more precisely, how did they achieve dominance in the first place? If they had to fight for it, the society would probably be even more tightly controlled, men being held in fiercely guarded camps, or perhaps even having to completely cover themselves in public.
If child bearing is also sacred, (what about child rearing?) this further underscores the separatism inherent between genders, which begs the question, is there romance within this society? Do unions exist, are they arranged or are the women and men completely separated except for the expressed purpose of procreation? Is it church sanctioned? Beyond procreation, are the primary relationships in this society homosexual? Is it an honor to be selected to give birth, or, regardless of the eyes of the church, is it a secret shame because of the association with the male of the species.
What do women and men think of one another? How do they interact? Are they even allowed to interact? Who fights the wars? Who starts the wars and why? If they send men to war, do they do so to control their populations through pointless arranged wars with other states? How are the genders educated? Do they worry about sin or souls? What are the religious requirements of each gender? Is there a god? More than one? How does the concept of magic influence society? What about the application of magic? Does greed exist? Murder? Debauchery? What are their stories like? Myths? Legends? Hope and dreams? When they think of the future, what do they see?
Are all societies on this planet similarly aligned, or is this culture unique. If so, how are they viewed by other nations and people? How does trade work?
And if they all get along passively, working together in a Utopian state, how did they overcome their predatory DNA to chill out and learn respect for one another, like in the species' early evolution? Or is this far into the future of this world?
SFF has a tradition of creating worlds as metaphors to address social commentary, the evils of the society being tipped or exaggerated in order for the book's themes to be explored. As a result, many of those worlds are familiar, but as the social fabric gets increasingly distorted, more explanation (creative investment) is required to maintain the suspension of disbelief. It's not necessary to actually write the history of the people, but everything that does happen needs to be consistent with that history. It's tough to do well.
The Iraqouis example works because of their level of development, that of a hunting and gathering tribe in a land of plenty. However, you mentioned technology. Imagine the magical gender division of your world in 1400 England. What would daily life look like? Humans have a history of being mercilessly cruel and power hungry to the point of absurdity. How does this society overcome this tendency? Or do they?
Yes, it is sexist, but it's still full of story. I'd recommend sorting it all out, the history of it, let your mind race from consequence to consequence, logical requirement to logical leap, and then figure out the themes you want to explore...or write it, and then go back and see what themes emerged, and reinforce those. The bottom line is there needs to be a story reason for why the world is as it is.
That's my 2 cents.