Do I need to prepare my queries when there's number input only?

I have some JS apps associated with MySQL. I have limited knowledge of MySQL, but I know that I mustn't send the raw user input directly to DB, so I prepared the queries using ? like the following code, according to npm js's preparing queries.

connection.query('SELECT * FROM users WHERE id = ?', [userId], function (error, results, fields) {
  if (error) throw error;
  // ...
});

connection.query('UPDATE users SET foo = ?, bar = ?, baz = ? WHERE id = ?', ['a', 'b', 'c', userId], function (error, results, fields) {
  if (error) throw error;
  // ...
});

Other apps with these prepared queries work fine. (I'm not sure it will be enough though)

But I have this app, taking the order from user input(there's no keyboard input), and sending them to DB. So the only input from the user is numbers. My app will be accessible for anyone, and I granted the user SELECT, INSERT, DELETE. Should I sanitize/prepare queries for this case also? If so, what method should I use to do so? The above way is not working for these queries.

//When the user puts items in the cart, bring the equivalent product info by joining them with product info table
router.post("/", (req, res) => {
    const bodyData = req.body;
    db.query(
        `INSERT INTO cart_table (item_id) VALUES(${bodyData.id})`, (err, rows) => {
            db.query(
                `SELECT cart_table.id as order_id, item_name, item_price, item_category, count, product_info.id as id FROM product_info JOIN cart_table on product_info.id = cart_table.item_id where item_id = ${bodyData.id}`,
                (err, orderedItem) => {
                    res.json({ 'orderedItem': orderedItem[0] });
                }
            );
        }
    );
});

// When user clicks an item, add the selected item or increase selected item's quantity in cart table
router.put("/", (req, res) => {
    const bodyData = req.body;
    db.query(
        `UPDATE cart_table SET count = ${bodyData.count ? parseInt(bodyData.count) : "count+1"
        } WHERE item_id = ${bodyData.item_id}`,
        (err, rows) => {
            res.send({ status: 200 });
        }
    );
});

// When the user orders, insert cart items to the order table and empty the cart table.
router.post("/", (req, res) => {
    const bodyData = req.body;
    const values = bodyData.map(({count, id}) => `(${count === null ? 1 : count}, ${id})`).join(",");
    db.query(
        `INSERT INTO order_table (count, item_id) VALUES${values}`,
        (err, rows) => {
            const order_id_array = bodyData.map(({ order_id }) => `id = ${order_id}`).join(" or ");
            db.query(
                `DELETE FROM cart_table`
            );
            res.send({ status: 200 });
        }
    );
});