prevent-blocks.php

add_filter( 'allowed_block_types_all', 'restrict_blocks');

function restrict_blocks( $allowed_blocks ) {
	if ( ! is_super_admin() ) {
			$allowed_blocks = array(
				'core/block',
				'core/image',
				'core/gallery',
				'core/paragraph',
				'core/heading',
				'core/list',
				'core/quote',
				'core/file',
				'core/button',
				'core/separator',
				'core/embed',
				'core/shortcode',
				'core/table',
				'core/media-text',
				'ksas-callouts/ksas-callout-block',
				'tribe/event-datetime',
				'tribe/event-organizer',
				'tribe/event-venue',
				'tribe/event-website',
				'tribe/event-links',
			);
	}
	return $allowed_blocks;
}