functions.php

<?php
class Blocks{
public function __construct(){
  add_filter( 'allowed_block_types_all', [ $this, 'remove_template_blocks' ], 50, 2 );
}
public function remove_template_blocks( $allowed_block_types, $block_editor_context ) {
		
		if ( ! isset( $block_editor_context->name ) ) {
			return $allowed_block_types;
		}
		
		if(is_array($allowed_block_types)){
			var_dump($allowed_block_types); die;
		}
		
		if(is_array($allowed_block_types) && $block_editor_context->name != 'core/edit-site'){
			$block_to_remove = 'vczapi/single-zoom-meeting';
			$index = array_search( $block_to_remove, $allowed_block_types );
			if ( $index !== false ) {
				unset( $allowed_block_types[ $index ] );
			}
		}
		

		return $allowed_block_types;
	}
}