If anyone is interested in root, I have a video outlining how to get Hal9k Mod v4.0 (Android 9.0) on the GA2170 which comes with an updated Magisk installed.
https://youtu.be/6pJY8nQl4MI
If you need a MCU for your unit (grab MTCE_WWW_294bd) and you can also add the soundmod if you want...