initilize the quickview for woocommerce-lightbox on facetwp-loaded event.

functions.php

<?php

// add the below code to your child themes functions.php file.

add_filter( 'facetwp_assets', function( $assets ) {
?>
<script>
(function($) {
    $(document).on('facetwp-loaded', function() {
		$('.product').magnificPopup({
			type:'inline',
			midClick: true,
			gallery:{
				enabled:true
			},
			delegate: 'a.wpb_wl_preview',
			removalDelay: 500, //delay removal by X to allow out-animation
			callbacks: {
			    beforeOpen: function() {
			       this.st.mainClass = this.st.el.attr('data-effect');
			    }
			},
		  	closeOnContentClick: false,
		});
     });
})(jQuery);
</script>
<?php
	return $assets;
});

this snippet just saved me! thanks so much man!