I don't think so... He voluntarily took himself out of the 'story' to create a scenario where Mirae can live in peace without dying. You can say he erased his fate to exchange it for his son's future and erased himself from existence, that's why Mirae feels connected to him but will never know who he was.
I'm pretty sure Mirae's mom either because her fate was to die and come back as a zomgan to guide Mirae towards his power hidden deep inside. Her and his death was necessary for their son's growth.
The zomgan that came back might be ones that were not fated to die when they did, since Mirae is the 'protagonist' of the story his father created. It resolves around him, his fate
Is the dad restored too or are we restoring shits one minute ago?