Hello,
Woocommerce does not provide the option to do that and our theme does not either. You will have to customize them with custom CSS:
1. Find the code: http://prntscr.com/lsdb18
2. Insert it into the Theme Settings > Custom CSS > Global
body .woodmart-my-account-links .orders-link a:before {
content: “\f069”;
font-family: FontAwesome;
}
3. Change content and font-family, add body
before the selector
You can take the icons from https://fontawesome.com/v4.7.0/icons/ other icons are not supported.
Best Regards