These types of star explosions are extremely rare. Every hundred years or so a star in our Milky Way galaxy go supernova. But a supernova that leaves trackable gamma-ray burst, like GRB 221009A, explodes only every million years in a medium-sized galaxy like ours, Cendes explains.
After the supernova explosion, a black hole appears. According to NASA “Most black holes form from the remnants of a large star that dies in a supernova explosion.”
A star dies. A supernova rises. And a black hole is born.