Query child posts with tax query on parents

My solution to this ended up splitting this into 2 queries:

1. Get the IDs of all the parent products I want to ignore

2. Get all the variations that don’t a post_parent from that list of IDs

   $archived_products = wc_get_products(
       array(
           'type' => array( 'variable', 'variable-subscription' ),
           'paginate' => false,
           'limit' => -1,
           'category' => array( 'archive', 'membership' ),
           'return' => 'ids',
       )
   );
   $my_query->set( 'post_parent__not_in', $archived_products );