[ksa]

console.log(arr.text)

Как вариант...

type fruits = {
	id: string,
	data: string
}
type vegetables = {
	id: string,
	text: string
}

let arr: (fruits | vegetables)[] = [
        {id: "1", data: "sadsa"}, 
        {id: "2", text: "sdsadsa"}
]
const o = arr[1] as vegetables
console.log(o.text)