@EntBudha you can use this code to get that done, make changes to the code based on your needs
add_filter('aioseop_title', 'change_gadget_title', 10, 2);
function change_gadget_title( $title ){
global $paged, $page;
$site_name = get_bloginfo('name');
$sep = '|';
if( is_post_type_archive('CUSTOM_POST_TYPE') ) {
$title = $title.' '. $sep .' '. $site_name;
if ( $paged >= 2 || $page >= 2 ) {
$title .= sprintf( __( ' - Part %s' ), max( $paged, $page ) );
}
}
return $title;
}