Hi,

By default, Odoo doesn’t allow you to do that. It uses data-bs-toggle which toggles on and off for showing the submenus. You can use js and css effect if you want to achieve what you desire.

Please check this link : https://www.w3schools.com/w3css/tryit.asp?filename=tryw3css_dropdown_hover

or give this in css

.dropdown:hover>.dropdown-menu {
    display: block;
}

Regards

If you are referring to a navigation menu with dropdown sub-menus, you can usually set the top menu item to link directly to the page of your choice. This is often done by adding a custom link to the top menu item, or by setting the top menu item to link to the page without having a dropdown sub-menu. Consult the documentation of the software you are using to find out how to do this.