[рони]

Aidec,

const ar = [    {name: 'Anton', age: '20', status: '123#Yes'}
, {name: 'Artem', age: '23', status: null}
, {name: 'Rafik', age: '32', status: 'No'}
, {name: 'Andrey', age: '30'}]
ar.forEach( ob => {
ob.status = ob.status ? ((ob.status).split('#')[1] || ob.status) : 'Отсутствует'
})
console.log(ar)