Flurl Timeout not respected

Question

I use Xamarin Forms app and call my api with Flurl.

I tried a lot of different solutions but I always have a timeout arround 10 seconds. I would like 30.

My code to setup my flurl client:

_client = new FlurlClient(ApiUrl);

            TimeSpan timeSpan = new TimeSpan(0, 0, 30 * 1000);
            _client.WithTimeout(timeSpan);
            _client.HttpClient.Timeout = timeSpan;
            _client.Settings.Timeout = timeSpan;

I also tried with my call by using CancellationToken in my DelegatingHandler:

response = await base.SendAsync(request, new CancellationTokenSource(new TimeSpan(0, 0, 80)).Token);

But nothing changes.