Hello Morelli!
Now I see what you need …
Unfortunately, for now, you can’t bold a part of the Icon box content.
But, there is another easy way to do that:
1. Remove the content from the Icon Box element (leave it empty) https://prnt.sc/hqw2ur
2. Prepend the text element to the Icon Box element https://prnt.sc/hqw3af , https://prnt.sc/hqw3pm
3. Enter your text content into textbox element and modify it. https://prnt.sc/hqw44q
For now isn’t possible to add the custom icons. Maybe we implement more icons in some of next updates.
Thank you for the understanding.
Best Regards