Get the total Author Favorited posts

<?php
$args22 = array(
    'post_type'  => array ('menus', 'recipes' ),
    'author'     => get_queried_object_id(),
    'meta_query' => array(
        'meta_key' => 'simplefavorites_count',
        'value'    => '0',
        'compare'  => '>=',
    ),
);

$my_query = new WP_Query( $args22 );

echo 'Found posts: ' . $my_query->found_posts . '<br />';

// declare variable and set total votes to 0
$total_fav_count = 0;

if ( $my_query->have_posts() ) {
    while ( $my_query->have_posts() ) {}
        $my_query->the_post();

        // add custom field value to total votes
        $total_fav_count += get_post_meta( get_the_ID(), 'simplefavorites_count', true );
    }
}

//
echo 'Total user favorite votes: ' . $total_fav_count . '<br />';

wp_reset_postdata();

It’s also a good idea to check if simplefavorites_count meta key exists:

<?php
$args22 = array(
    'post_type' => array ('menus', 'recipes' ), 
    'author' => get_queried_object_id(),
    'meta_query' => array(
        'relation' => 'AND',
        array(
            'meta_key' => 'simplefavorites_count',
            'value'   => '0',
            'compare' => '>=',
        ),
        array(
            'meta_key' => 'simplefavorites_count',
            'compare' => 'EXISTS',
        ),
    ),
);