Would a black hole after eons of losing mass due to Hawking radiation, eventually turn into a burning star again? As it’s pressure will no longer be overwhelmed by the gravity it once had and through proton decay the heavier elements would be stripped back into hydrogen?
Black holes are not lumps of matter held together by gravity, but something very different. So while Hawking radiation will eventually make them evaporate and this process gets hotter and faster the smaller they get, the end result is just that the mass once captured is re-radiated as energetic particles. Exactly what happens at the last moments of evaporation is still unknown, but it will never be a star.