Horizon theme: drop-down menu alignment

Yes, this rule prevent the menu underlay from showing:

.overflow-menu:after,
.header__underlay {
  display: none; 
}

An option is to change it to:

.overflow-menu:after,
.header__underlay {
/*  display: none; */
  max-height: var(--header-height);
}

I’ve shared the full updated code at Horizon Submenu/dropdown alignment & carat - #7 by tim_tairli