“If your airplane had an inflight fire at altitude, would you want oxygen deployed?”
If I make delete your term ‘deployed’ and replace it with ‘don’, then the answer is yes.
Every jet I’ve flown says that for a cockpit or cabin fire, the first thing you do is put on smoke goggles and don the oxygen mask.
I personally don't know, just am asking questions.
I don't know how things are separated and isolated on that a/c.
Otoh, a fight, leading to a zoom climb to FL450 and then to a stall and fall to recovery is certainly possible, if that reported flight data is true.
It's all just speculation.