Pydantic v2 ModelConfig option to deepcopy on construction?

[jamesbraza]

Pydantic v1's model configuration had copy_on_model_validation (docs) which configured shallow vs deepcopy vs none on construction. Pydantic v2 removed this, and now has revalidate_instances (docs). It seems Pydantic v2 by default does a shallow copy on model construction.

When dealing with Pydantic v2 models containing nested BaseModel, the default shallow copy doesn't deeply copy the nested BaseModel.

Is there some way to configure a Pydantic v2 object to deepcopy during construction?