White beans themselves don’t have a ton of flavor, so the other ingredients in the soup will drive the wine pairing. Here are three approaches.
1. With greens or shellfish
Beans and greens (with or without shellfish) are a Mediterranean classic. If the soup doesn’t contain pork or tomatoes, try a zesty Italian white, like Soave or Verdicchio.
2. With tomatoes
Even if there are greens or shellfish involved, the tomatoes in your soup will drive the pairing. You can rarely go wrong with lighter styles of rosé from Provence; the light fruit and acidity just works with tomatoes.