Project Downtime
All Star
Engagement rings go on the right hand after the wedding to make space for your wedding ring. But like, no one does that anymore.
99% of people you will encounter on a daily basis in the US will wear their engagement finger on their left ring finger and stack the wedding band above/below it.
Guessing me, family, friends, and co-workers have been doing it wrong for decades. It had always been engagement right on the right, wedding band on the left, with the option of stacking after the wedding based on tradition and unwritten etiquette rule(s).