Your own scientists can only speculate on how they work. Why do you expect us to know everything?
If you notice, instead of answering the OP/question, the thread is immediately turned to RET debate.
A simple, "I don't know" is sufficient. But, that is not how it works. FE questions derail to defending RET. That is the debate tactic.
So, getting back on topic and the OP, how does FE explain supernovas?
At least
TheEngineer is providing a constructive debate.