It’s shameful that a report has not been released yet. We have all the evidence that we need. Important recommendations for the industry must be published before another incident like this happens again. Time is of the essence.
Just using amateur deductions, this looks very similar to the ground incident at Cario ironically with EgyptAir MS667. Fire accidentally started probably by the charging of an Apple device, then the O2 hose gets involved causing a blowtorch effect spreading down into the electrics bay.