Hi @cj18
This is Mike from Omega
In this case, you can add this code below to Custom CSS of your product page
code:
ul.product__media-list li.product__media-item:nth-child(n+7) {
display: none;
}
It just hide images on your product page, but these hidden images still are loaded to your website.
Hope my answer will help you.
Mike from Omega