I have the same issue, with all of the devices I own: Samsung A12, Samsung A41, Huawei P8 lite, Lenovo Tablet.

iRealPro is totally unusable with USB. To playback and read chords the only solution is to connect the Android device to the Nux Mighty 2 by a Usb-C cable.

Such scenario is very very uncomfortable.

Have the developers planned to find a solution?