A developer create a new bundle with 3 levels of child products, as shown below.

If only the parent product displays when adding a new bundle with multiple levels of child products to the Cart, it's likely that the platform cache has not been refreshed to include recent changes or additions: B. The product hierarchy data in the platform cache has not been refreshed. Refreshing the cache ensures that all the latest data, including hierarchical relationships among the products within a bundle, is up-to-date. This step is crucial especially after adding new products or making structural changes to existing product configurations.