Render block somewhere else in PHP

I want to hide my block-lab block from the page content and show it in the header. How do I render the block in header.php?

In my header.php I have:

<?php get_hero_banner($post->post_content) ?>

In functions.php my problem is render_block_core_block

function get_hero_banner($content){
	$blocks = parse_blocks( $content );
	$content = '';
	foreach ($blocks as $block) {
		if ($block['blockName'] == 'block-lab/hero') {
			$attributes = (array) $block['attrs'];
			$render     = render_block_core_block( $attributes );
			$content   .= $render;
		}
	}
	if ($content == '') {
		$content = '<p>Missing block</p>';
	}
	return $content;
}