Custom unordered bullet show differently on desktop and mobile

First try at getting some help here.
Used custom code in site head to customize the undordered list bullets.
Work A1 on desktop. But appart from the color, nothing follows on mobile and the svg bullet revert to the default dots.

Can’t find why. Could you?

Usefull info.

Here is my site Read-Only: LINK
(how to share your site Read-Only link)

Found my answer.
I removed the site code and added the one below in the of the pages it was need.
(Note: the location of the changes might not have changed anything. But the code did)

.class-name ul {
padding: 0;
list-style-type: none;
.class-name ul li{
background-image: url(‘image-url.svg’);
background-repeat: no-repeat;
padding-left: 20px;
background-position: 0 3px;