send object with GetFromJsonAsAsyncEnumerable

Working with .net8.0 Blazor Web App with MinimalAPI and FastEndpoints. Currently, to send an object to a get request that returns a list I'm using

        var req = new GetAgencyListRequest()        {            AgentLastName = _searchText,            AgencyName = _searchText        };    using (var httpSvc = new HttpService(state))    {        var request = new HttpRequestMessage            {                Method = HttpMethod.Get,                RequestUri = new Uri(httpSvc.BaseAddress +"agency/AgencyList"),                Content = new StringContent(JsonSerializer.Serialize(req), Encoding.UTF8,"application/json")            };        var response = await httpSvc.SendAsync(request);        if (!response.IsSuccessStatusCode)            throw new Exception("Could not get Agency list");        using (var stream = response.Content.ReadAsStream())        {            var options = new JsonSerializerOptions { PropertyNameCaseInsensitive = true };            _gridData = JsonSerializer.Deserialize<List<Agency>>(stream, options);        }    }

This works, but it seems like it could be simplified. I found GetFromJsonAsAsyncEnumerable, but can't find a way to send the request object. I could pass as parameters, but I have other more complex requests so I want to use this method.

var uri = new Uri("agency/AgencyList");var resp = httpSvc.GetFromJsonAsAsyncEnumerable<Agency>(uri);

I can't find a way to send the object.

How do I send an object with this method?

Thank you