Overwrite core blocks settings via block.json in gutenberg (wordpress > 5.8, block-api v2)

gistfile1.php

<?php
function yours59_filter_metadata_registration( $settings, $metadata ) {
	/*
	 copied all block configuration files form gutenberg plugin (wp-content/plugins/gutenberg/build/block-library/blocks/**) to theme folder
	 so that I'm able to overwrite it from here, and do not loose changes every time gutenberg plugin updates
	*/

	$is_core_block = strpos( $metadata['name'], 'core/' );
	if ( $is_core_block === 0 ) {
		$name = substr( $metadata['name'], 5 );
		$path = get_template_directory() . '/block-config/' . $name . '/block.json';
		if ( file_exists( $path ) ) {
			$from_json = json_decode( file_get_contents( $path ), true );
			if ( is_array( $from_json ) ) {
				$settings = array_replace_recursive( $settings, $from_json );
			}
		}
	}
	return $settings;
};

if ( is_admin() ) {
	add_filter( 'block_type_metadata_settings', 'yours59_filter_metadata_registration', 10, 2 );
}