Looks like an issue on mobile is that the scroll event is not triggered. Like block can not be reached. And block is animated with classes
“scroll-trigger animate–slide-in scroll-trigger–offscreen” so opacity is set to 0.01 in
.scroll-trigger.animate--fade-in, .scroll-trigger.animate--slide-in {
opacity: 0.01;
}
So it is there but not visible.
You can try to remove the animation, if there is an option in settings or override the CSS
.footer__content-bottom {
opacity: 1;
}