Position of image in Product form

Hi,

I found some code on this forum to add an image in the product form pop up but it's positioned over the text - is there a way of positioning it before the text?

This is the code I'm using:

body.collection-type-products .lightbox-content .field-list: after {
    content: "";
    background-image: url(https://cdn.pixabay.com/photo/2021/02/07/09/11/sunset-5990540__340.jpg);
    background-size: contain;
    background-repeat: no-repeat;
    display: block;
    position: sticky;
    right: 20px;
    z-index: 9999;
    top: calc(100% + 100px);
    transform: translateY(-50%);
    width: 500px;
    height: 300px;
    visibility: visible;
    clear: none !important;
}

Change

:after

to

:before

It doesn't work properly, please share link to page where you use form, we can check easier