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「qrmenu_react/src」フォルダに「components」フォルダを新規作成します。
作成した「components」フォルダに「MenuItem.js」ファイルを新規作成します。

新規作成　【QRMenu/qrmenu_react/src/components/MenuItem.js】

import {Col } from 'react-bootstrap';
import React from 'react';
import styled from 'styled-components';

const Container = styled.div`
    border-radius: 5px;
    background-color: white;
    margin-bottom: 30px;
    box-shadow: 1px 1px 8px rgba(0,0,0,0,1);
    display: flex;
    opacity: ${({active}) => (active ? 1 : 0.6)};
    > div: first-child {
        width: 40%;
        border-top-left-radius: 5px;
        border-bottom-left-radius: 5px;
        background-size: cover;
    }
    > div:last-child {
        padding: 15px 20px;
        min-height: 150px;
    }
`;

const MenuItem = ({ item }) => (
    <Container active={item.is_available}>
        <Col xs={5} style={{ backgroundImage: `url(${item.image})` }} />
        <Col xs={7} className="d-flex flex-column justify-content-between w-100">
            <div>
                <h4 className="mb-2">
                    <b>{item.name}</b>
                </h4>
                <p className="mb-4">{item.description}</p>
            </div>
            <div className="d-flex justify-content-between align-items-end">
            <div>
                <h5 className="mb-0 text-standard">
                    <b>{item.price}円</b>
                </h5>
            </div>

            {!item.is_available ? (<big className="text-danger">品切れ</big>) : null}

            </div>
        </Col>
    </Container>
);

export default MenuItem;

「qrmenu_react/src/pages/Place.js」ファイルを編集します。

記述編集　【QRMenu/qrmenu_react/src/pages/Place.js】

import { IoMdArrowBack } from 'react-icons/io';
import { Row, Col, Button } from 'react-bootstrap';
import { useParams, useHistory } from 'react-router-dom';
import React, { useEffect, useState, useContext } from 'react';
import styled from 'styled-components';

import { fetchPlace } from '../apis';
import AuthContext from '../contexts/AuthContext';
import MainLayout from '../layouts/MainLayout';
import MenuItemForm from '../containers/MenuItemForm';
import MenuItem from '../components/MenuItem';

const Panel = styled.div`
    background-color: white;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 1px 1px 10px rgba(0,0,0,0.05);
`;


const Place = () => {
    const [place, setPlace] = useState({});

    const auth = useContext(AuthContext);
    const params = useParams();
    const history = useHistory();

    const onBack = () => history.push("/places");

    const onFetchPlace = async () => {
        const json = await fetchPlace(params.id, auth.token);
        if(json) {
            setPlace(json);
        }
    };

    useEffect(() => {
        onFetchPlace();
    }, []);

    return (
        <MainLayout>
            <Row>
                <Col lg={12}>
                    <div className="mb-4">
                        <div className="d-flex align-items-center" Style="margin-left: 2rem; margin-top: 2rem;">
                            <Button variant="link" onClick={onBack}>
                                <IoMdArrowBack size={25} color="black" />
                            </Button>
                            <h3 className="mb-0 ml-2 mr-2">{place.name}</h3>
                        </div>
                    </div>
                </Col>
                <Col md={4}>
                    <Panel>
                        <MenuItemForm place={place} onDone={onFetchPlace} />
                    </Panel>
                </Col>

                <Col md={8}>
                    {place?.categories?.map((category) => (
                        <div key={category.id} className="mb-5">
                            <h4 className="mb-0 mr-2 mb-4">
                                <b>{category.name}</b>
                            </h4>
                            {category.menu_items.map((item) => (
                                <MenuItem key={item.id} item={item} />
                            ))}

                        </div>
                    ))}
                </Col>


            </Row>
        </MainLayout>
    )
};

export default Place;