Try this variation instead:
add_action('wp_footer', 'wp_footer_add_js_button_class');
function wp_footer_add_js_button_class() {
?>
<script>
(function(){
document.querySelectorAll('.asp_sb_2_1 .asp_label').forEach(function(label){
if ( label.querySelector("input[type=radio]").checked ) {
label.classList.add('asp_label_selected');
}
label.addEventListener('click', function(event) {
document.querySelectorAll('.asp_sb_2_1 .asp_label').forEach(function(element){
element.classList.remove('asp_label_selected');
});
this.classList.add('asp_label_selected');
});
})
}())
</script>
<?php
}It will set the class to the label, where the radio button is preselected by default.
If you are also using elementor live widget filtering, then try enabling the auto populate feature, so the plugin triggers an initial search with the selected arguments.