Gutenberg blocks and ESI doesn’t work

Hello, I need help with understanding how to make gutenberg block work with ESI.

Here’s an example of code in my functions.php.

I have ESI function that I use in different places of the website template (and it’s working fine), but I also want to use it in custom gutenberg block.

I have registered gutenberg block with “acf_register_block” function, and used a callback, but nothing’s working in that gutenberg block.

/*ESI COUNTRY NAME*/
function esi_country_name(){
	do_action('litespeed_control_set_nocache');
	$country_detect = do_shortcode('[useriploc type="country"]'); //Get user country name by ip
	if($country_detect){
		$country_name = 'Your country is '.$country_detect.'.';
	}else{
		$country_name = 'Your country not detected.';
	}
	echo $country_name;
}
add_action('litespeed_esi_load-esi_block_country_name', 'esi_country_name');

/*REGISTER GUTENBERG BLOCK WITH ACF*/
function acf_gutenberg_blocks_init(){
	if(function_exists('acf_register_block')){
		acf_register_block(array(
			'name'=>'user_location',
			'title'=>'User Location',
			'description'=>'Get user location by ip.',
			'render_callback'=>'user_location_acf_block_render_callback',
			'category'=>'formatting',
			'icon'=>'menu',
			'mode'=>'edit',
			'keywords'=>array('user location'),
		));
	}
}
add_action('acf/init', 'acf_gutenberg_blocks_init');

/*USER LOCATION CALLBACK*/
function user_location_acf_block_render_callback($block){
	echo '<p>'.apply_filters('litespeed_esi_url', 'esi_block_country_name', 'Country Name').'</p>';
}