You can add custom attributes to “Read More” using the Combo Blocks plugin. This article will help you add custom attributes for “Read More.”
To begin, insert a “Post Excerpt” block.

Click on the “Read More” tab.

Now toggle the “Linked with Post?” button on.

On “Custom Attributes,” click the “Add” button to create a custom attribute.

Now enter the attribute “Name” and “Value” for custom attributes.
