meta_query
and orderby
are seperate parameters, you just put them together in an array. You will have to do one then the other.
e.g.
<?php
$args = array(
'post_type' => 'property',
'meta_query' => array(
array(
'relation' => 'AND',
'city_clause' => array(
'key' => 'city',
'compare' => 'EXISTS',
),
'street_clause' => array(
'key' => 'street_name',
'compare' => 'EXISTS',
),
)
)
'orderby' => array(
'city_clause' => 'desc',
'street_clause' => 'desc',
)
)
?>
https://developer.wordpress.org/reference/classes/wp_query/#order-orderby-parameters