How to return all objects in an array of objects?

Question

I am trying to get all objects in an array of objects. I've tried searching online for a solution and got some helpful tips. However, it only returns one of the objects and not all of the objects in the array. I can't seem to figure out why?

Array of objects:

[{"id":"_f939IxLRjn0YVvOEg5SR","type":"multiple","category":"Entertainment: Video Games","question":"Which Sonic the Hedgehog game was originally supposed to be packaged with Sonic 3, but was cut in half due to time constraints?","correct_answer":"Sonic & Knuckles","incorrect_answers":["Sonic 2","Sonic CD","Sonic 3D Blast"]},{"id":"84LQQOeMZqeqYweGXKZ47","type":"multiple","category":"General Knowledge","question":"Which American-owned brewery led the country in sales by volume in 2015?","correct_answer":"D. G. Yuengling and Son, Inc","incorrect_answers":["Anheuser Busch","Boston Beer Company","Miller Coors"]}]

Array.reduce code:

const [quizObj, setQuizObj] = useState({});

useEffect(() => {
    setQuizObj(() => {
      return allQuiz.reduce((obj, item) => Object.assign(obj, { ...item }), {});
    });
  }, [allQuiz]);

console.log output:

{"id":"84LQQOeMZqeqYweGXKZ47","type":"multiple","category":"General Knowledge","question":"Which American-owned brewery led the country in sales by volume in 2015?","correct_answer":"D. G. Yuengling and Son, Inc","incorrect_answers":["Anheuser Busch","Boston Beer Company","Miller Coors"]}

Desired output:

{item: {"id":"_f939IxLRjn0YVvOEg5SR","type":"multiple","category":"Entertainment: Video Games","question":"Which Sonic the Hedgehog game was originally supposed to be packaged with Sonic 3, but was cut in half due to time constraints?","correct_answer":"Sonic & Knuckles","incorrect_answers":["Sonic 2","Sonic CD","Sonic 3D Blast"]}, {"id":"84LQQOeMZqeqYweGXKZ47","type":"multiple","category":"General Knowledge","question":"Which American-owned brewery led the country in sales by volume in 2015?","correct_answer":"D. G. Yuengling and Son, Inc","incorrect_answers":["Anheuser Busch","Boston Beer Company","Miller Coors"]}}