The Community post you linked applies to FAQ accordion card since it uses the chevron for the row expand by default. To change the icons that appear next to CTAs such as on product cards, update the iconName or iconUrl property as described in the Data Mappings & CTAs unit.
Can you clarify what you’re looking for on adding a chevron icon to the View All link? There is a chevron icon by default.
In order to change the View All icon, you’ll need to override the theme by going to Tools > Jambo Commands > Override Theme. The file(s) you’ll want to override are answers-hitchhiker-themes > universalsectiontemplates > standard.hbs and the grid-two-columns.hbs or grid-three-columns.hbs if you’re using those files in your experience as well.
In the newly created theme override files, you can then change “iconName” to “iconUrl” similar to what Micaela did for FAQ accordion cards in the link you provided. It will look something like this:
Since you are overriding the theme, make sure to pay attention to this file any time you upgrade your theme. You’ll most likely want to pull the new file in the theme upgrade and make this change again.