Hi,

Try to add the following code snippet to the Custom CSS area in Theme Settings to fix this issue.

.wpb-js-composer .dokan-profile-frame-wrapper .fa, 
.wpb-js-composer .dokan-add-new-product-popup .fa, 
.wpb-js-composer .dokan-dashboard-wrap .fa {
	font-weight: 600;
}

Regards