ASIAIR Beta v2.3 (build 14) has appeared on iOS/iPadOS/macos TestFlight.
Firmware is now 11.43.
I updated the ASIAIR firmware (first gen "Plus" model) using macos TestFlight version, and the Beta app on an 12.9" iPad appears to be connect successfully. Note: for safety, I do not have any USB devices connected whenever I power the ASIAIR hardware up to update firmware (and I never use any of ASIAIR's DC power ports anyway).
Remember: this is Beta; which means don't download unless you are willing to perform Beta tests, and feedback problems and suggest fixes for the bugs.
Chen