Hello,
First of all thanks for choosing our Theme, we are glad to be you in the WoodMart WordPress family :-)
.
I saw the screenshot you attached and visited your website and the spacing working fine on my end. Please clear cache and check back.
Screenshot for Clarification: https://ibb.co/ggVdn77
If you still want to increase it then try adding the following Custom CSS in the Custom CSS for Desktop area under Theme Settings >> Custom CSS.
.whb-primary-menu #menu-item-11416 {
margin-left: 10px;
}
Best Regards.