What are marriage markers in your settings?
On planet Avatar, people exchange golden bracelets when they get married. After wedding the couple wears the bracelets every day when they go outside. On Mars and Terra people keep using the pre imperial custom of wedding rings. On cold planet of Leji everyone adopted old goblin custom of exchanging colorful necklaces, which are worn as a marker of married people. Meanwhile on Pluto someone invented marriage tattoos, people put the name of their spouse on their wrists or hands.
So what do people in your setting use to mark their status as married people?