In the future, I'd like to add the ability to use your own config file so the app can search for bluetooth devices and services defined in the config file. Each device/manufacturer uses different initialization and communication protocols, so it's going to take some time to figure out the details. Right now, it's just the Keon, FL, and Onyx that are searched for (they use the Kiiroo protocol for linear motion). I could probably add support for Kiiroo vibrating devices, but I'd need to purchase one to test to make sure it works. Support for using multiple devices at the same time is on the to-do list, but it requires significant UI/UX work, so I'm waiting until after the UE5/OpenXR to consider working on it.
Right now, my priorities are adding DLNA support, submitting the app to the Meta app store, and updating to UE5 with a new UI that supports hand tracking, eye tracking, and passthrough.