It’s more of a personal preference thing for British men than it just being something you wear for American men. Prince Edward also wear a wedding ring, yet he’s married to a British woman. Of course they will take their wives’ opinion into it if they don’t want to wear one. I can’t imagine there is much to discuss if the man in question wants to wear a wedding ring. My view on this based on what we know about Harry is that he’s likely to want to wear one.