How do you run Cucumber tests in parallel?

package runners;

import io.cucumber.testng.AbstractTestNGCucumberTests;
import io.cucumber.testng.CucumberOptions;
import org.testng.annotations.DataProvider;

@CucumberOptions(
    features = "src/test/resources/features",
    glue = {"stepDefinitions", "hooks"},
    plugin = {
        "pretty",
        "html:target/cucumber-parallel-report.html",
        "json:target/cucumber-parallel.json"
    },
    monochrome = true
)
public class ParallelTestRunner extends AbstractTestNGCucumberTests {

    @Override
    @DataProvider(parallel = true)  // ← THIS enables parallelism
    public Object[][] scenarios() {
        return super.scenarios();
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.9.dtd">
<suite name="Cucumber Parallel Suite" parallel="methods" thread-count="5">
    <test name="Parallel Cucumber Tests">
        <classes>
            <class name="runners.ParallelTestRunner"/>
        </classes>
    </test>
</suite>

// ScenarioContext.java — new instance per scenario (PicoContainer guarantees this)
public class ScenarioContext {
    public WebDriver driver;  // each scenario gets its OWN instance
}

// Hooks.java
public class Hooks {
    private final ScenarioContext ctx;

    public Hooks(ScenarioContext ctx) { this.ctx = ctx; }

    @Before
    public void setUp() {
        WebDriverManager.chromedriver().setup();
        ChromeOptions options = new ChromeOptions();
        options.addArguments("--headless=new", "--no-sandbox", "--disable-dev-shm-usage");
        ctx.driver = new ChromeDriver(options);  // each thread gets its own driver
        ctx.driver.manage().window().maximize();
    }

    @After
    public void tearDown(Scenario scenario) {
        if (scenario.isFailed()) {
            byte[] screenshot = ((TakesScreenshot) ctx.driver)
                .getScreenshotAs(OutputType.BYTES);
            scenario.attach(screenshot, "image/png", "Failure");
        }
        ctx.driver.quit();
    }
}

// Runner1.java — runs login.feature
@CucumberOptions(features = "src/test/resources/features/login.feature", ...)
public class Runner1 extends AbstractTestNGCucumberTests {}

// Runner2.java — runs checkout.feature
@CucumberOptions(features = "src/test/resources/features/checkout.feature", ...)
public class Runner2 extends AbstractTestNGCucumberTests {}

<!-- Run both in parallel -->
<suite name="Feature Parallel" parallel="tests" thread-count="2">
    <test name="Login">
        <classes><class name="runners.Runner1"/></classes>
    </test>
    <test name="Checkout">
        <classes><class name="runners.Runner2"/></classes>
    </test>
</suite>

<plugin>
    <groupId>com.github.temyers</groupId>
    <artifactId>cucumber-jvm-parallel-plugin</artifactId>
    <version>5.0.0</version>
    <executions>
        <execution>
            <goals><goal>generateRunners</goal></goals>
            <configuration>
                <parallelScheme>SCENARIO</parallelScheme>
                <glue>stepDefinitions</glue>
            </configuration>
        </execution>
    </executions>
</plugin>

<!-- masterthought plugin merges parallel JSON reports -->
<plugin>
    <groupId>net.masterthought</groupId>
    <artifactId>maven-cucumber-reporting</artifactId>
    <version>5.8.1</version>
    <executions>
        <execution>
            <goals><goal>generate</goal></goals>
            <configuration>
                <projectName>AutomateQA</projectName>
                <outputDirectory>target/cucumber-html-reports</outputDirectory>
                <jsonFiles>
                    <param>target/**/*.json</param>
                </jsonFiles>
            </configuration>
        </execution>
    </executions>
</plugin>