gform_block_form_forms_alphabetical.php

<?php

/**
 * Sort forms in Gravity Forms block in alphabetical order.
 *
 * @param array $forms A collection of active forms on site.
 */
add_filter( 'gform_block_form_forms', function( $forms ) {

	usort( $forms, function( $a, $b ) {
		return strcmp( $a['title'], $b['title'] );
	} );

	return $forms;

} );