I have a project I created, a .NET MAUI Blazor Hybrid and Web App.I followed the procedure to install Mudblazor found here: https://www.mudblazor.com/getting-started/installation#manual-install
I then added a MudDrawer with MudNavMenu and MudNavLink's
<MudDrawer id="nav-drawer" @bind-Open="_drawerOpen" ClipMode="DrawerClipMode.Always" Elevation="2"><MudNavMenu Dense="true" Rounded="true" Margin="Margin.Dense" Color="Color.Secondary" Class="pa-2"><MudNavLink Href="/counter" Icon="@Icons.Material.Filled.Face6" Underline="Underline.None">Counter</MudNavLink><MudNavLink Href="/weather" Icon="@Icons.Material.Filled.WbSunny" Underline="Underline.Always">Weather</MudNavLink></MudNavMenu> </MudDrawer>As you can see I set the Underline attribute to None and Always on each MudNavLinkHowever.. It doesn't underline the Weather optionenter image description here