Better control SearchWP (v3) during WP All Import import routine https://searchwp.com/docs/kb/best-work-content-imports/

functions.php

<?php

/**
 * NOTE: THIS IS FOR SEARCHWP VERSION 3
 */


/**
 * WP All Import SearchWP PRE-import routine
 * 
 * @link https://searchwp.com/docs/kb/best-work-content-imports/
 */
function myswp_before_xml_import( $import_id ) {
    // Pause the SearchWP indexer during import
    SWP()->indexer_pause();
    
    // Tell SearchWP to ignore edit events
    searchwp_update_option( 'prevent_delta_triggers', true );

    // Purge SearchWP index
    //     This is optional, but beneificial if your import process 
    //     overwrites ALL content indexed by SearchWP.
    //     NOTE: if this is uncommented, the pmxi_saved_post action
    //         below should be commented out as it is not necessary.
    // SWP()->purge_index();
}

add_action( 'pmxi_before_xml_import', 'myswp_before_xml_import', 10, 1 );

/**
 * WP All Import callback that runs for each imported entry.
 * Purge that post from the SearchWP index.
 *
 * NOTE: If you are purging the index in pmxi_before_xml_import above
 *       this hook should be disabled as it is not necssary.
 * 
 * @link https://searchwp.com/docs/kb/best-work-content-imports/
 */
function myswp_post_updated( $post_id ){
	SWP()->purge_post( $post_id );
}

add_action('pmxi_saved_post', 'myswp_post_updated', 10, 1 );


/**
 * WP All Import SearchWP POST-import routine
 * 
 * @link https://searchwp.com/docs/kb/best-work-content-imports/
 */
function myswp_after_xml_import( $import_id ) {
    // Tell SearchWP to resume listening to edit triggers
    searchwp_update_option( 'prevent_delta_triggers', false );

    // Re-enable the SearchWP indexer
    SWP()->indexer_unpause();

    // Trigger the indexer to rebuild the index
    SWP()->trigger_index();
}

add_action( 'pmxi_after_xml_import', 'myswp_after_xml_import', 10, 1 );

Thank you for your reply. Do you know how to create a new start index via code? I've tried several methods already:
SWP()->process_updates();
SWP()->update_index();
SWP()->trigger_index()

But still there are posts that cannot be found by searchWP.

To receive support please open a support ticket using the Support tab of the SearchWP settings screen, thank you!