Applies to: Scarlett & Clarett Range

The only sample rate options found in Windows -> Sound -> Playback Devices is the sample rate currently selected for the Interface. 

In order to change the sample rate or buffer size, you need to open the Focusrite Device Settings

This is located in:

Start menu -> Search for Focusrite Device Settings

Or find the notifier in your Task Bar

Refer to this article if you can not find the Device Settings icon - Why can't I see the Focusrite Notifier icon in my taskbar on Windows?

In this window, you can select the Sample Rate and Buffer Size, as well as see the current firmware and driver version