Hi Silvan,

I hope you are having an awesome day and thanks for contacting us regarding your query.

While there isn't an option for this within the theme, here's a way to add icons to your menu items:

https://wptavern.com/how-to-easily-add-icons-to-menus-in-wordpress

Kindly check this out and see if it could work. 

Please let me know if there are any more questions that I may answer for you :)

Cheers!