If the Parallels Access app on iOS is not recognizing your mouse after pairing over Bluetooth you may need to enable support in its settings menu.
You can find the settings menu at the top right of the Parallels Access home screen. From there scroll down to the "User Input" section where you will find a "Use Swiftpoint GT Mouse" option. Ensure that this is enabled for full functionality of both the GT and ProPoint in Parallels Access.