Create a custom Coming Soon page with Beaver Builder

functions.php

// add a custom Coming Soon page
add_action( 'template_redirect', 'my_custom_coming_soon' );
function my_custom_coming_soon() {
    if( !is_user_logged_in() && !is_page( 'coming-soon' ) ){
        wp_redirect( site_url( 'coming-soon' ) );
        exit();
    }
}