You can add an event to the list container listening to
lv_obj_get_scroll_top you can see the current scroll position to set up an animation or an arc or so accordingly.
The “arc” should have
LV_OBJ_FLAG_FLOATING | LV_OBJ_FLAG_IGNORE_LAYOUT to be sure it’s not scrolled with the list (floating) and not positioned by the layout of the list (ignore layout).
that is great, can’t help but sigh, lvgl is really broad and profound, I just learned the fur of it.