Page with Mega Menu header small text goes here...
Color Admin use bootstrap 5 default collapse function to toggle / collapse the mega menu for mobile view.
<div id="header" class="app-header">
<div class="navbar-header">
...
<button type="button" class="navbar-mobile-toggler" data-bs-toggle="collapse" data-bs-target="#top-navbar">
<span class="fa-stack fa-lg text-dark">
<i class="far fa-square fa-stack-2x"></i>
<i class="fa fa-cog fa-stack-1x mt-1px"></i>
</span>
</button>
</div>
<div class="collapse d-md-block me-auto" id="top-navbar">
<div class="navbar-nav">
<div class="navbar-item dropdown dropdown-lg">
<a href="#" class="navbar-link dropdown-toggle pe-md-2" data-bs-toggle="dropdown">
<i class="fa fa-th-large fa-fw me-1 me-md-0"></i>
<span class="d-lg-inline d-md-none">
Mega <b class="caret ms-1 ms-md-0"></b>
</span>
</a>
<div class="dropdown-menu dropdown-menu-lg">
...
</div>
</div>
...
</div>
</div>
<div class="navbar-nav">
...
</div>
</div>