There is a slight question of whether or not Doctor Who’s audio dramas are canon, though one can argue as such considering they’re signed off on by the BBC. In Season 12 it seemed to me like the revelation the Doctor supposedly isn’t a Time Lord (and the reason they can regenerate) was the key to The Master’s survival, so I’m curious to see if this audio drama explanation will be referenced.
We can only speculate for now and wait to see if this story holds any weight when Season 13 arrives.
Perhaps Chris Chibnall already had a way of explaining the comeback?