Okay, the only thing I can suggest you do is dequeue the jquery script that WordPress enqueues automatically and then whenever you’re ready i.e. the vast majority of the page has loaded re-enqueue it, but until you load it the admin ui will most likely be a little bit broken.
Another possible solution is, filter into the script_loader_tag function which is what WordPress uses to output script tags and do the following:
add_filter( 'script_loader_tag', function ( $tag, $handle ) {
// this will currently add async to everything, so add conditions here where needed
return str_replace( ' src', ' async src', $tag );
}, 10, 2 );
Which will effectively force the async attribute to be appended to the script tag .
I hope this helped.
Ref:
https://developer.wordpress.org/reference/hooks/script_loader_tag/
