Lenses solve a problem you don't have in OOP. Since OOP allows mutation, to change a value within a nested structure, just mutate it. If you don't want to mutate, then getters and setters don't help and changing nested structures is awkward.

Lenses solve the nested mutation problem for immutable structures but then go past what you can do with getters and setters. For example, you can compose bigger lenses out of smaller ones.