insta-auto-follow.js

const delayPromise = (timeout) =>
    new Promise((resolve) => setTimeout(resolve, timeout));

setInterval(() => {
    let btns = Array.from(
        document.querySelectorAll('.sqdOP.L3NKy.y3zKF')
    ).filter((btn) => btn.innerText.toLowerCase() === 'follow');

    (btns || []).forEach(async (btn) => {
        btn.click();
        await delayPromise(100000);
    });

    let scrollContainer = document.querySelector('.isgrP');

    scrollContainer.scrollTop += 2 * scrollContainer.scrollHeight;
}, 10000);