Sliders are always done via JavaScript.
There is no API in Weaver or Weaver Show Sliders to accommodate direct manipulation of slider images via PHP.
If your images are defined by a custom post type (ACF gallery, perhaps? I don’t know myself.), then you might not even have to iterate through the images directly, but could use a [show_posts] + [show_sliders] filter directly via a shortcode.
This is a pretty non-trivial exercise. There are a bunch of different JavaScript sliders available, all with different capabilities and ease of interface.
But this adding JS to custom PHP is way beyond the level of support.