Yes, you could but this will require a manual modification of the theme config file. It will be overwritten every time you update the theme. The other thing is that adding many icons will add extra website download size.
Here are the steps to add the icons to your theme:
1) Open system/vendor/BurnEngine/themes/kiddos/config.php
Thank you for your answer!
Last question in this topic and you can close that like resolved my little problem
What do you mean “The other thing is that adding many icons will add extra website download size.” That will be bad for webshop speed. Bad for seo?