how can i find data in an array of arrays?

I would suggest you take a look at this site

Especially at the following method which should get you started:

function arrayAlreadyHasArray(arr, subarr){
    for(var i = 0; i<arr.length; i++){
        let checker = false
        for(var j = 0; j<arr[i].length; j++){
            if(arr[i][j] === subarr[j]){
                checker = true
            } else {
                checker = false
                break;
            }
        }
        if (checker){
            return true
        }
    }
    return false
}