post_type !== 'page' ) { // Prevent the modal block from being added in any post or template $allowed_blocks = array_diff( $allowed_blocks, ['your-theme/modal'] ); } return $allowed_blocks; } add_filter( 'allowed_block_types', 'restrict_modal_block_in_templates', 10, 2 ); /* Add the modal to the footer (or optionally use wp_head to add it to the header) */ function add_modal_to_every_page() { // Get the modal content from the theme part or reusable block $modal_content = get_theme_part( 'modal' ); // Assuming get_theme_part is a custom function to fetch your modal content. if ( $modal_content ) { echo ''; } } add_action( 'wp_footer', 'add_modal_to_every_page' );