First of all thank you very much for using the plugin,
You can definitely display the excerpt in the pages but you need to go through the child theme.
After creating and activating the child theme create the folder “wp-travel”. Inside the folder “wp-travel” create the folder “shortcode”. Inside the shortcode folder create the file “itinerary-item.php” and add below given code.
Regarding your query, currently, there is no feature to display the icon in the archive page and as much as we would love to help you with this we are unable do so as it requires higher code customization.
So if you want then you can hire our professional developer so that you get what you exactly want.
To hire a developer please refer to the below given link: