Please try this PHP snippet to start. It adds a description with some link to the Images field. In this way, it is possible to add descriptions with links to other fields
add_filter(
'hivepress/v1/forms/listing_update',
function( $form ) {
if(isset($form['fields']['images'])){
$form['fields']['images']['description'] = 'custom text here and <a href="#">link is here</a>';
}
return $form;
},
1000
);