How can I Center the underline hover effect on mobile menu

Hi,
I'm currently using this code:

/* nav links underline effect */
.main-navigation .menu > .menu-item > a::after {
    content: "";
    position: absolute;
    right: 0;
    left: 50%;
    bottom: 20px;
    -webkit-transform: translateX(-50%);
    transform: translateX(-50%);

    display: block;
    width: 0;
    height: 2px;

    background-color: currentColor;
    transition: 0.3s width ease;
}
.main-navigation .menu > .menu-item.current-menu-item > a::after,
.main-navigation .menu > .menu-item > a:hover::after {
    width: 50%;
}

but on the mobile view, the underline is centered, but the text is on the left. Is there a way to move the underline on hover beneath the menu item text?

Thanks