def _supports_native_multioutput(self) -> bool:
        """
        Returns True if the model supports multi-output regression natively.
        """
        model = (
            self.model.estimator
            if isinstance(self.model, MultiOutputRegressor)
            else self.model
        )
        return model.__sklearn_tags__().target_tags.multi_output

        Returns True if the model supports multi-output regression natively.
        
darts/models/forecasting/sklearn_model.py