Okay, since this is not taking off, I'll add a few:
2. Dwelling by the West Lake - in this Chinese movie, a modern retelling of the legend of Mulian, a mother gets caught up in a pyramid scheme. Her son's arc mirrors hers, as he innocently takes on a job in a business designed to fleece vulnerable seniors. The hard lesson he learns when the business is busted helps him better understand his mother's situation.
3. Tokyo Story - An aged couple visit their children's homes in Tokyo. The mirrored arcs could probably better be described through the Kishōtenketsu traditional narrative structure. Initial arcs in the ki and shō portions follow a depressingly repeated pattern (or series of mirrored arcs) of adult children who have little time or concern for their parents. But when the film arrives at the ten / twist, the elderly couple find true kindness and warmth in the modest dwelling of their daughter-in-law, who lives alone after their son disappeared during the war.
4. It's Okay, That's Love - a mirrored arc of two minor characters foreshadows an issue that will arise for the leads. I've been rewatching this, and it's as beautiful, hard-hitting, and searing as I remember.