This is called the black hole information paradox. Today most physicists believe that hawking radiation preserves quantum information. Hawking himself made a be

This is called the black hole information paradox. Today most physicists believe that hawking radiation preserves quantum information. Hawking himself made a bet that it doesn’t, but by 2004 he had become convinced and conceded the bet. But as far as I know this is still an open question - we’ve never detected hawking radiation experimentally.