只需将状态更改为一个数组，并在切换时将键“pop”/“push”到其中，然后声明一个curried处理程序，该处理程序接受键，并执行正确的切换逻辑。我删除了isOpen状态，因为它在示例中没有使用，但是您可以像更改isHidden状态和切换器一样更改它：

const [ isHiddenList, setIsHiddenList ] = React.useState([])
const toggleHidden = key => () => {
        setIsHiddenList(
            isHiddenList.includes(key)
                ? isHiddenList.filter(existingKey => existingKey !== key)
                : [ ...isHiddenList, key ]
        );
};

const data = [
    {
        "key": "1"
        "name": "gvf",
        "email": "abc",
        "companyname": "xyz",
        "address": "abcy"
    },
    {
        "key": "2"
        "name": "abi",
        "email": "dhf",
        "companyname": "dhd",
        "address": "fhfh"
    }
]

return (
    <div>
        <Row>
            <Col> 
                <table  className="table table-hover table-striped table-sm">
                    <thead className="thead-dark">
                        <tr>
                        <th>Name</th>
                        <th>Email</th>
                        <th>CompanyName</th>
                        <th>Address</th>
                        </tr>
                    </thead>    
                    <tbody>  
                        {
                            data.map(({ key, name, email, companyname, address }) => {
                                const isHidden = isHiddenList.includes(key);
                                return (
                                    <tr key={key}>
                                        <td><Button onClick={toggleHidden(key)}>Click</Button>
                                        {!isHidden && <p>Hello ABIII</p> }
                                        </td>    
                                        <td>{a.name}</td>
                                        <td>{a.email}</td>
                                        <td>{a.address}</td>
                                        <td>{a.companyname}</td>
                                    </tr>
                                );
                            })
                        }
                    </tbody>
                </table>
            </Col>
        </Row>
    </div>
)

免责声明-键应该是数据项的一部分以保持一致性，动态生成的迭代索引不保证键将被正确分配。