Hi there!
Thanks for reaching out to us.
This is happening because of the menu column then cannot fit in the defined space. There is a huge padding among menu items.
https://prnt.sc/jxxyzVLwYg7_
You can simply lower the padding value as per your need to get a better view even when you need to add more menu items there.
Here is sample code that you need to put in the custom CSS:
#sp-header.header-with-modal-menu .menu li:not(:last-child) {
padding-right: 20px;
}
Here is all about custom code placement in Helix Ultimate framework: https://www.joomshaper.com/documentation/helix-framework/custom-code-css-js-meta
Best Regards