JSFiddle - React, Tailwind, and code Playground

HTML

<!-- ko foreach: data -->
<input type="radio" name="radio-choice" data-bind="attr: { id: 'radio-nr-'+$index() }" />
<label data-bind="attr:{ for: 'radio-nr-'+$index() }">Label</label>
<span data-bind="text: 'radio-nr-'+$index() " ></span>
<!-- /ko -->

JavaScript

ko.applyBindings({
        data: ['one', 'two', 'three']
    });