Steps to add an image icon to read more button on the Divi blog module.

Step 1: Add the class customBlog to your blog module.

Step 2: Create your icon image. In this case I’m using a 30 x 30 pixel image. If you use a different size, update the 30px to the size of your image.

Step 3: Update the background-image: url to your image.

Step 4: Add the custom CSS to the Divi theme options / Custom CSS area.

Step 5: Style your read more button in the Divi module.

/* adding image icon to read more button on blog module BEGIN */

.customBlog .more-link::before {

	content: "";

	background-image: url(https://www.embryodesign.com/wp-content/uploads/2022/12/icon-red-club.png) !important;

    background-size: 30px auto;

	background-position: left top;

	background-repeat: no-repeat;

	min-height: 30px;

	padding-top: 5px !important;

	padding-right: 40px !important;

}

.customBlog .post-content-inner {	

	padding-bottom: 20px!important;

}

.customBlog .et_pb_image_container {

	margin: 0 0 0 !important;

}

/* adding image icon to read more button on blog module END */