Touch devices scrolling is not working

[maviarebo]

In Touch devices scrolling is not working.

my code for bootstrap modal popup.
document.addEventListener('DOMContentLoaded', function () {
document.querySelectorAll('.modal').forEach(function (modal) {
modal.addEventListener('shown.bs.modal', function () {
if (modal.classList.contains('modal-smooth-scroll')) {

            // var modalScrollbar = window.Scrollbar;
            Scrollbar.init(modal.querySelector('.viewport'), { damping: 0.04, renderByPixel: true, continuousScrolling: false });

            let modalScrollBar = Scrollbar.init(modal.querySelector('.re-scroll-container'));

            modalScrollBar.addListener(({ offset }) => {
                modalScrollPositionX = offset.x;
                modalScrollPositionY = offset.y;
            });

            modalScrollBar.setPosition(0, 0);
            modalScrollBar.track.xAxis.element.remove();

            ScrollTrigger.scrollerProxy(modal, {
                scrollTop(value) {
                    if (arguments.length) {
                        modalScrollBar.scrollTop = value;
                    }
                    return modalScrollBar.scrollTop;
                },
                // pinType: 'transform',
            });
            

            modalScrollBar.addListener(ScrollTrigger.update);
            const modaltextSlidUpTimeline = gsap.timeline();
        }
    });
});

});