gistfile1.txt

<?php
/**
 * Register webinar date type variation
 *
 * @param array $variations Array of block type variation
 * @param WP_Block $block_type The block type.
 * @return array
 */
function webinar_date_block_variation( $variations, $block_type ) {
	if ( 'core/paragraph' === $block_type->name ) {
		$variations[] = array(
			'name' => 'webinar-date',
			'title' => 'Webinar Date',
			'attributes' => array(
				'metadata' => array(
					'bindings' => array(
						'content' => array(
							'source' => 'acf/field',
							'args'	 => array(
								'key' => 'webinar_date',
							),
						),
					),
				),
			),
		);
	} 
	return $variations;
}
add_filter( 'get_block_type_variations', 'webinar_date_block_variation', 10, 2 );