Remove arrow from submenu

Please provide a link to a page on your site where we can see this. Thanks.

This CSS will remove the arrow

.elementor-navigation .menu-item-has-children > a:after {
  display:none;
}

To add CSS:

• If you are using WordPress 4.7 or later, use the “Additional CSS” option in the customizer.
• If your theme has a custom CSS option, use that to add the CSS shown above.
• If not, install the plugin Simple Custom CSS.

Learn to use the Chrome Developer Tools to help you see and test changes to your CSS.