Also a note from the app team, it is already supported.
We omitted it from release logs to avoid confusion, the threads are updated:
App 13.9 released (Alpha for Passthrough, Multi-script)
- Haptics:
- Multi-script - Added a dropdown to switch between multiple scripts that play on your Haptic device, read about it here
App 13.10 released (Multi-axis scripts)
- Haptics:
- Multi-axis - app supports multi-axis scripts, read about it here