Help with icons class field

I am failing to get the icon feature working. I would be grateful if someone could help. I couldn’t find en example that may help me with this.

I am using astra theme asnd have the Better Font Awesome plugin installed.. I can use [icon name=”arrow-left” style=”solid” class=”” unprefixed_class=””] to insert an icon on a page.

I don’t know how to enter “arrow-left” and “solid” in the sidebar Shortcode generator Class field. I have tried various combinations. but nothing produces a icon.

How is the Shortcode generator class field used? Could someone provide an example of how they have used this field with their icons?