That’s not how hawking radiation works. Basically some particle pairs will always form near the event horizon. Some halves of the pair fall inwards others escape the black hole. The escaping ones are lost mass for the black hole. This happens for all sized black holes at all times just that for small black holes it happens really quickly but bigger black holes it happens incredibly slowly.

It will takes trillions of years to evaporate any stellar sized black hole but all black holes evaporate all the time.