1. To change your Valve Controller's name, please select its Location from the side menu, then click on the "Devices" tab on the bottom bar of the app, and click on your Valve Controller.
2. Click on the edit icon or the triple dot menu (⋮) on the top right-hand corner.
3. Then under "Device Settings" > "General", you can edit the Valve Controller's name.
3. Once done, click on "Save Changes".
You can watch videos on how to edit your Valve Controller's name by clicking on the below links:
How to Change Your Valve Controller's Name (Android)
How to Change Your Valve Controller's Name (iOS)