Tab completion not working with Accessibility Keyboard

**Describe the bug**

As the title says tab completion is not working with the Accessibility Keyboard.

**Versions**
- Copilot for Xcode: 0.27.0
- Xcode: 16.1
- macOS: 15.1

**Steps to reproduce**
1. Open the Accessibility Keyboard in Settings -> Accessibility -> Keyboard -> toggle Accessibility Keyboard on
2. start typing in xcode and try to tab complete with the on-screen Accessibility Keyboard

**Screenshots**

https://github.com/user-attachments/assets/9990d285-b882-4543-b874-919aea852796

**Logs**

**Additional context**