The final report on this incident was published on 8th July 2021 (IG-190/CENIPA/2018), although it references only the aircraft PT-MUG and not the flight number. Both the airmanship of the pilots, and the subsequent electrical fault tracing and analysis are wonderous to behold.
Followers of the "777X Woes" thread might find much of interest.
The fault cascade is somewhat beyond by understanding, particularly the relevance of the fault in the permanent magnet generator. But taking the report's conclusion as correct, are the recommendations not somewhat thin?
Surely an examination of a sample of the failed connectors in other 777s would have been merited, at least?