When using the mobile menu in accordion mode, you can click on the "+" icon to open the submenus. Sometimes you will need this toggler to apply on the whole item text too, for example if you have a separator item as parent link.

You can do that with a little CSS trick. Add this code in the mobile plugin custom css area, or in a template css file :

.mobilemaximenuck .mobilemaximenucktogglericon::after {
    text-align: right;
    width: 100%;
}