Customize the arguments sent to SWP_Query

functions.php

<?php

function my_searchwp_swp_query_args( $args ) {
  // customize $args as per https://searchwp.com/docs/swp_query/
  
  return $args;
}

add_filter( 'searchwp_swp_query_args', 'my_searchwp_swp_query_args' );