...
    on('task', {
        allureTestStep () {
            const testStep = allure.createStep("Initial", () => {
                console.log("First Test")
            });
            testStep()
            return null
        }
    })
...

cy.task('allureTestStep')

allure-js-commons: Unexpected startStep() of initial. There is no parent step
First Test
allure-js-commons: Unexpected endStep(). There are no any steps running