I am debating picking up the Phoenix with Android 9 Fastboot for our 2010 LX570. Their website states that the "Factory Backup Cam is not retained". Not sure if the LC unit has the same issue. Did you replace the backup cam? How about the front camera? Does that work? Does it support wireless carplay or does it require USB?
In my previous Lexus GX460 the reverse camera was not retained, as Lexus uses a different voltage for power.