Get ACF field value from Gutenberg block [WordPress]

get_acf_block_data.php

// Get ACF value whetherit comes from regular ACF or ACF block
// Useful if you need to access ACF fileds that are in block as regular fields
// Usage: get_acf_block_data($post, 'acf/talk-description', 'talk_description' )
function get_acf_block_data($post, $block_name = 'acf/default-block-name', $field_name = "" ){
	$content = "";
	if ( has_blocks( $post->post_content ) && !empty($field_name )) {
	    $blocks = parse_blocks( $post->post_content );
	    foreach($blocks as $block){			
		    if ( $block['blockName'] === $block_name ) {
		    	if(isset($block["attrs"]["data"][$field_name ])){
                   $content = $block["attrs"]["data"][$field_name ];
		    	}
		    }	    	
	    }  
	}
	return $content;
}

what about update?
do you have sample code for updating ?
update_acf_block_data
if you have please share