Change Title of Block in Block Catalog Plugin

functions.php

<?php

add_filter( 'block_catalog_block_title', function( $title, $block_name, $block ) {
	$map = [
		"xyz/custom-block" => "My Custom Block",
	];

	if ( ! empty( $map[ $block_name ] ) ) {
		return $map[ $block_name ];
	}

	return $title;
}, 10, 3 );