how to find item array into array in java script

I do this system but I cannot output from this I exactly want name:’mancing’or ‘mancing’
can anyone solve this problem

const data = [
  [name = 'john doe', name2 = 'hello'],
  [age = 23],
  [hobby = [{
    name: 'mancing'
  }]]
];
data.map((item, key) => console.log(item, key))