React e NodeJS Mongoosi-Paginator não está puxando a pagina 2

import React, { Component } from 'react';
import api from "../../services/api";

import './styles.css';

export default class Main extends Component {
    state = {
        products: [],
        productInfo: {},
        page: 1
    };

    componentDidMount() {
        this.loadProducts();
    }

    loadProducts = async (page = 1) => {
        const response = await api.get('/products?page=$');

        const { docs, ...productInfo } = response.data;

        this.setState({ products: docs, productInfo, page });
    };

    prevPage = () => {
        const { page, productInfo } = this.state;

        if (page === 1) return;

        const pageNumber = page - 1;

        this.loadProducts(pageNumber);
    };

    nextPage = () => {
        const { page, productInfo } = this.state;

        if (page === productInfo.pages) return;

        const pageNumber = page + 1;

        this.loadProducts(pageNumber);
    };

    render() {
        const { products, page, productInfo } = this.state;

        return (
            <div className="product-list">
                {products.map(product => (
                    <article key={product._id}>
                        <strong>{product.title}</strong>
                        <p>{product.description}</p>

                        <a href="">Acessar</a>
                    </article>
                ))}
                <div className="actions">
                    <button disabled={page === 1} onClick={this.prevPage}>Anterior</button>
                    <button disabled={page === productInfo.pages} onClick={this.nextPage}>Próximo</button>
                </div>
            </div>
        )
    }

}