How can I stream json data in self hosted ASP.NET Web API

Question

Since IAsyncEnumerable is not available in ASP.NET Web API (.NET 4.8). Is there any alternative so that I can stream json data?

I wanted to stream an array of json data instead of sending it as a whole.

In .NET Core, I can do the following:

    async IAsyncEnumerable<String> getValues() {
        yield return "test"; 
        for(int i = 0; i < 3; i++) {
            await Task.Delay(1000); 
            yield return "Test " + i; 
        }
    }
    
    app.MapGet("/addmq/v1/inventory/databases/{database}/akastream2", () => {
        return getValues(); 
    });

And then I can use curl -N then I can see each string in the terminal every second. How should I do that in .NET Framework 4.8?