Azure函数进程内模型中配置服务与Typed HttpClient的正确方法

在使用.NET进程内模型的Azure函数应用的Startup.cs中配置服务时，已在local.settings.json（及Azure托管环境）配置以下参数：

"MyOptions:BaseAddress": "https://dev.azurewebsites.net/api/",
"MyOptions:Scope": "xxx/.default",

通过扩展方法完成Options的配置：

private static IServiceCollection AddOptions(this IServiceCollection services)
{
    return services.AddOptions<MyOptions>()
        .Configure<IConfiguration>((settings, configuration) =>
        {
            configuration.GetSection(nameof(MyOptions)).Bind(settings);
        })
        .PostConfigure(opt => opt.ThrowIfValuesNotSet())
        .Services;
}

配置完Options后，希望配置Typed HttpClient时使用其中的BaseAddress，但不清楚如何实现，目前只能直接读取环境变量，不依赖配置类：

var baseAddress = new Uri(Environment.GetEnvironmentVariable($"{nameof(MyOptions)}:BaseAddress"));

对应的HttpClient配置代码如下（待填充BaseAddress）：

services
    .AddOptions()
    .AddHttpClient<IMyService, MyService>(client =>
        {
            client.BaseAddress = <value from options>;
        }
    )

后续在委托处理器中使用相同Options管理被调用服务的授权时，依赖注入可以正常工作：

public class MyAuthorizationHandler : DelegatingHandler
{
    private readonly TokenCredential _credential;
    private readonly MyOptions _options;

    public MyAuthorizationHandler(TokenCredential credential, IOptions<MyOptions> options)
    {
        _credential = credential;
        _options = options.Value;
    }

    protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
    {
        var token = await _credential.GetTokenAsync(
            new TokenRequestContext(new[]
            {
                _options.Scope
            }), cancellationToken);

        request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", token.Token);
        return await base.SendAsync(request, cancellationToken);
    }
}

已知可以从IFunctionsHostBuilder获取IConfiguration，但遵循IServiceCollection扩展方法的模式时，传递IConfiguration实例较为繁琐，求推荐实现方式。

更新
AddHttpClient存在支持获取服务提供者的重载，可通过该重载读取已配置的Options：

.AddHttpClient<IMyService, MyService>((provider, client) =>
{
    client.BaseAddress =
        new Uri(provider.GetRequiredService<MyOptions>().BaseAddress);
})

内容的提问来源于stack exchange，提问作者jokarl