Multiple requests external data api dynamic block gutenberg

You could use transients:

function requestApi() {
    $cache_key = 'your_transient_name';
    $values = get_transient( $cache_key );

    // if no data in the cache
    if ( $values === false ) {

        // build the URL for wp_remote_get() function
        $arguments = [
            'method' => 'GET',
        ];
        $request = wp_remote_get( 'https://example.com.br/api/endpoint/product-id', $arguments );
        
        if ( !is_wp_error( $request ) && wp_remote_retrieve_response_code( $request ) == 200 ) {
            $values = json_decode( wp_remote_retrieve_body( $request ) );
            // print_r( $values ); // use it to see all the returned values!

            set_transient( $cache_key, $values, 7200 ); // 2 hours cache
        } else {
            return; // you can use print_r( $values ); here for debugging
        }
        
    }
    return $values;
}

With this solution, the remote query is cached via the transients, which are stored in the wp_options, and re-requested at arbitrary time intervals.

This saves you valuable resources.

The principle is described here a little more in detail:

• https://developer.wordpress.org/apis/handbook/transients/
• https://rudrastyh.com/wordpress/weather-shortcode-api.html