Hiya,
I tried adding this to my mobile styles as advised by support:
.fl-menu-responsive-toggle-mobile nav li,
.fl-menu-responsive-toggle-mobile nav .sub-menu {
text-align: center !important;
}
.fl-menu-responsive-toggle-mobile nav .sub-menu {
padding-left: 0 !important;
}
But it’s not mirroring the main nav and dropdowns the way they are on the desktop nav.
I can share a URL, but it needs to be via private reply since it’s my company’s stage site. 
Thanks!