Source code for https://formidable-masterminds.com/columnize-dynamic-radio-button-fields

columnize-dynamic-radio-button-fields.js

<script>
jQuery(document).ready(function($) {
    "use strict";
    /* add "display: grid" to field's div.frm_opt_container
     * change frm_field_1142_container to the id of your field's container
     */
    $('div#frm_field_1142_container > div.frm_opt_container').css('display', 'grid');
    
    /* loop through each radio button to assign it to a grid column
     * change wild card selector [id^="frm_radio_1142-"] to the id
     * of your radio button input's parent div
     */
    var ctr = 1;
    $('div[id^="frm_radio_1142-"]').each( function() {
        $(this).css( 'grid-column', ctr );
        ctr++;
    });
});
</script>