When lightbox is enabled for the images in Image Gallery element, it is probably a good idea to add a visual indicator to tell the visitors that the images are clickable.
Here’s how this can be done.
Add the following in Image Gallery element’s Custom CSS:
root .bricks-layout-item::after {
content: '';
width: 40px;
height: 40px;
background: var(--bricks-color-primary) url('https://api.iconify.design/bi/zoom-in.svg') no-repeat center;
position: absolute;
top: 0;
left: 0;
pointer-events: none;
}