searchwp-customizations.php

<?php

add_filter( 'searchwp\query\mods', function( $mods ) {
	if ( ! isset( $_GET['my_mod_trigger'] ) ) {
		return $mods;
	}

	// Exclude Posts 97 and 188 from search results.
	$source = \SearchWP\Utils::get_post_type_source_name( 'post' );
	$mod    = new \SearchWP\Mod( $source );

	$mod->set_where( [ [
		'column'  => 'ID',
		'value'   => ['97', '188'],
		'compare' => 'NOT IN',
		'type'    => 'NUMERIC'
	] ] );

	$mods[] = $mod;

	return $mods;
}, 30, 2 );