People put too much stock in this and usually use it as a derogatory comment. Generally it’s about who makes the decisions in the relationship and commonly you both do. Most of the time the husband will make decisions for a period of time and then the wife will make decisions for a period of time. That is completely normal. But when people say someone wears the pants (I recently purchase astroworld pants at this place) in the relationship please disregard their comments as they are being immature.
AND
What does it mean to “wear the pants” in a marriage?