The flutter_driver finders are very limited making it difficult to find a single instance of any repeated widget. If the finders supported descendant, first, and last (as they do in flutter_test) this would become much easier.

As is, the only way to find one of a set of repeated elements is to assign a predictable unique key to the first element in the list. This often requires some hackery - we usually don't generate lists based on indices - happens in a callback that takes some renderable data type.