I managed to readjust the box size of the sub items which fixed the problem, I used following code:
.wp-block-navigation .has-child:not(.open-on-click):hover>.wp-block-navigation__submenu-container {
min-width: 9rem!important;
}
However, I sitll have issues to make the “legal” main header not clickable instead of acting like a drop down menu for the other items. Do you think you could assist me with this?