Why am I getting [object Object] instead of data?

Question

React

changeCategory = (e) => {
        const cardCars = document.querySelector('.card-cars');
        console.log(e.target.id);
        const filteredCotegory = this.state.cars
            .filter((car) => e.target.id === car.category)
            .map((car, index) => {
                console.log(car);
                return (
                    <Car
                        key={index}
                        title={car.title}
                        category={car.category}
                        image={car.image}
                        money={car.money}
                        checkCar={this.checkCarModalHandler}
                        data-category={car.category}
                    />
                );
            });
        cardCars.innerHTML = filteredCotegory;
    };

With this function, it displays [object Object] for me, although it is necessary that it displays cards with content