In the Anguttara Nikaya the Buddha comments than one of the onerous things about being a woman is that she is always subservient to a man (S.IV,239). This was not said by way of approval but only as an observation on how things are (or were), a ‘suffering’ (dukkha) for women.
When he was addressing his disciples he did speak of how he felt that it should be. In the Sigalovada Sutta the Buddha speaks about the duties a husband and wife should have towards each other. ‘He should honor her, not disparage her, not be unfaithful to her, give her authority, and provide her with adornments…She should organize her work properly, be kind to the servants, not be unfaithful, protect the family wealth and be skillful and diligent in all she does’ (D.III,190). I think the two most important things here are that both should be faithful (naticariya) to each other and that the husband should give authority (issariya vossaggena) to his wife. In the Buddha’s day that probably meant authority within the household. I think it would not be at all unreasonable to interpret this as applying to many more areas of life. When Nakulapita was critically ill his wife Nakulamata nursed him with great devotion and kept up his spirits with constant encouragement and . when the Buddha came to know about this he said to Nakulapita, It is a gain, a great gain for you in having Nakulamata full of compassion for you (anukampika), full of love for you (atthakama), as your mentor (ovadika) and teacher (anusasika, A.III,298). For someone to mentor and teach you, they have to be your equal or superior, at least in some areas. You need to be open enough to take their advice and they need to be confident enough to give it. Again this does not suggest a woman being in a passive or subservient position. In the Anguttara Nikaya the Buddha speaks of four things whereby a family prospers and endures. One of them is that they put in authority a virtuous woman or man (silavantam itthim va purisam va adhipacce thapenti, A.II,248).
The word adhipacca which I have here translated as ‘authority’ means, according to the PTS Dictionary, being overlord, supreme rule, lordship, sovereignty, power. The only thing that can be found that suggesting that a wife should be subservient in at least some way to her husband is in the discourse where he talks about the seven types of wives, the last four of which he seems to approve of. These four are the mother-like wife, the sister-like wife, the companion-like wife and the slave-like wife (A.IV,). One of the qualities that the fourth of these should have is that she is ‘obedient to her husband’(bhattu = husband, vasa = under, anuvattana = comply with, go according to).
All this together is hardly a ringing endorsement of the idea that a woman must take an inferior position in marriage and render authority to her husband.