Get Input Option Values of a TV (API?)

$elements = $modx->db->getValue($modx->db->select("elements", $modx->getFullTableName('site_tmplvars'), "id=" . $tvId));
    
    $aElements = explode('||', $elements);
    
    foreach($aElements as $e){
        $ee = explode('==', $e);
        $output.='<a href="#" id="category-'.$ee[1].'">'.$ee[0].'</a>';
    }

<?php
$tv = $modx->getObject('modTemplateVar',array('name'=>'MyTv'));
// or
$tv = $modx->getObject('modTemplateVar',$id); // ID of the TV

$optionValues = $tv->get('elements');
$defaultValue = $tv=>get('default_text');