For future generations, FacetWP support got back to me and pointed me to adding a listener for facetwp-loaded.
https://facetwp.com/help-center/developers/javascript-reference/facetwp-loaded/
sample function:
function facetwp_bricks_accordion_fix() {
?>
<script>
document.addEventListener('facetwp-loaded', function() {
bricksAccordion();
});
</script>
<?php
}
add_action( 'wp_footer' , 'facetwp_bricks_accordion_fix' , 100 );