UIKitConfiguration.swift

public struct UIKitConfiguration<T: UIView> {

    public let apply: (T) -> Void

    public init(_ apply: @escaping (T) -> Void) {
        self.apply = apply
    }

}

public extension UIKitConfiguration where T: UIKitTextField.View {

    static var zipCode: UIKitConfiguration {
        return .init { textField in
            textField.autocorrectionType = .no
            textField.clearButtonMode = .whileEditing
            textField.font = UIFont.systemFont(ofSize: UIFont.labelFontSize, weight: .semibold)
            textField.keyboardType = .numberPad
            textField.placeholder = "Enter something..."
            textField.textColor = .red
        }
    }

}

UIKitTextField.swift

public struct UIKitTextField: UIViewRepresentable {

  public init(
        configuration: UIKitConfiguration<UIKitTextField.View>,
    ) {
        self.configuration = configuration
    }

    public func makeUIView(context: UIViewRepresentableContext<UIKitTextField>) -> View {
        let textField = View()
        textField.setContentCompressionResistancePriority(.defaultLow, for: .horizontal)
        configuration.apply(textField)
        return textField
    }

    private let configuration: UIKitConfiguration<View>

}

public extension UIKitTextField {

    final class View: UITextField {
    }

}

View.swift

struct FormTextField: View {

  var body: some View {
      UIKitTextField(configuration: .zipCode)
  }

}