If you set Footer Image, and you need to change it to another image on a Product Page, you can follow these.
#1. Change Footer Image on All Portfolio Pages
You can use this code to Custom CSS box.
body:has(section[class*="portfolio"]) footer.sections .section-border img {
content: url(https://cdn.pixabay.com/photo/2024/05/19/13/27/daisies-8772617_1280.jpg);
}
#2. Specific Portfolio Page
You can find Portfolio Page ID.
In my example, it is: #collection-67b92e51511fc93fd93925c8
You need to change it to this format: body.collection-67b92e51511fc93fd93925c8
(replace # with body. )
Next, use this code to Custom CSS
body.collection-67b92e51511fc93fd93925c8 {
footer.sections .section-border img {
content: url(https://cdn.pixabay.com/photo/2024/05/19/13/27/daisies-8772617_1280.jpg);
}}