C# Azure Function Limits 250 MB Response Size; I need 2GB response

Question

All the theory around C# azure function app says no size limitation on response. But practically it limits to 250 MB. Anything more than that produces 0 byte response; no error anywhere. My use case is to return ~2GB response. Here's the production app service plan that I'm using. Do I need to configure anything to increase from 250 MB of the size limitation?

foreach(var outputData in outputList)
    await httpResponseData.Body.WriteAsync(outputData);