JSFiddle - React, Tailwind, and code Playground

HTML

<div ng-controller='MyCtrl'>
    Show additional options <input type="checkbox" ng-model="additionalOptions">
    <div ng-show="additionalOptions">
        <ul>
            <li ng-repeat="option in availableOptions">
                <label class="checkbox" for="opt_{{option.id}}">
                    <input type="checkbox" name="opt_{{option.id}}" id="opt_{{option.}}" ng-model="option.checked"/>
                    {{option.name}}
                    
                    <ul ng-show="option.checked">
                        <li>
                            <div ng-repeat="i in getItterator(option.count)">
                                <input type="text"  ng-model="option.values[$index]"/>
                               {{option.values[$index]}}
                            </div>
                        </li>   
                    </ul>
                </label>
            </li>
        </ul>
    </div>
</div>

JavaScript

function MyCtrl($scope) {
    $scope.availableOptions = [{"id":"1","name":"easy","count":"2",values:[]},{"id":"2","name":"medium","count":"3",values:[]},{"id":"3","name":"hard","count":"2",values:[]}];
    
    $scope.getItterator=function(n){
	    var a = new Array();

	    for(var i=1; i <= n; i++)
			a.push(i);

	    return a;	    
	};
    
}