Where do I wire up serilog-aspnetcore's UseSerilogRequestLogging extension method in a .NET Core 6 Worker Service?

I'm trying to integrate Serilog and Seq into Visual Studio's .NET 6 Worker Service template, but I can't figure out where to wire up serilog-aspnetcore's UseSerilogRequestLogging extension method.

The template provides this implementation in Program.cs (to which I've added .UseSerilog and .UseWindowsService)

IHostBuilder hostBuilder = Host.CreateDefaultBuilder(args)
    .UseSerilog((ctx, lc) => lc
        .WriteTo.Console()
        .ReadFrom.Configuration(ctx.Configuration))
    .UseWindowsService(options => { options.ServiceName = "My Service"; })
    .ConfigureServices(services =>
    {
        services.AddHostedService<Worker>();
    });

IHost host = hostBuilder.Build();

await host.RunAsync();

My packages

    <ItemGroup>
        <PackageReference Include="Microsoft.Extensions.Hosting" Version="6.0.1" />
        <PackageReference Include="Microsoft.Extensions.Hosting.WindowsServices" Version="6.0.0" />
        <PackageReference Include="Microsoft.Extensions.Http" Version="6.0.0" />
        <PackageReference Include="Serilog.AspNetCore" Version="6.0.1" />
        <PackageReference Include="Serilog.Expressions" Version="3.4.0" />
        <PackageReference Include="Serilog.Sinks.Seq" Version="5.2.0" />
        <PackageReference Include="Twilio.AspNet.Core" Version="6.0.0" />
    </ItemGroup>

I can't figure out where to wire up serilog-aspnetcore's UseSerilogRequestLogging extension method.

• Where is my application's IApplicationBuilder? (does it have one?)
• Or is there some other way I need to plug Serilog into the request pipeline?

public static IApplicationBuilder UseSerilogRequestLogging(
            this IApplicationBuilder app,
            string messageTemplate)

see SerilogApplicationBuilderExtensions.cs