There’s indeed bricks_before_header hook that can be used for this.
// Render a Bricks Template by its ID above the site header.
add_action( 'bricks_before_header', function() {
echo do_shortcode( '[bricks_template id="1229"]' );
});
Replace 1229 with the ID of your top bar template.
You may have to add this CSS at Bricks → Settings → Custom code → Custom CSS:
// Render a Bricks Template by its ID above the site header.
add_action( ‘bricks_before_header’, function() {
echo do_shortcode( ‘[bricks_template id=“1229”]’ );
});