Use

• flat function => https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/flat

• filter function => https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/find

It will return the first value satisfying condition

Something like:

const data = [
  [{_id: 1}, {_id: 2}, {_id: 2}, {_id: '60da3d5ce6cdd45d6dbc56bd'}],
  [{_id: 1}, {_id: 2}, {_id: 2}],
  [{_id: 1}, {_id: 2}, {_id: 2}]
]

data.flat().find(e => e._id === '60da3d5ce6cdd45d6dbc56bd')
// output { _id: '60da3d5ce6cdd45d6dbc56bd' }

works just fine