Hi Jonathan. With the Webhooks Add-On, if you map individual fields on the Webhooks feed, rather than sending all fields, you will get the values rather than the raw entry data.
If mapping the individual fields will not work for you, you can get the field value like this:
$field = GFAPI::get_field( $form, '22' );
$request_data['6.1'] = $field->get_value_export( $entry, '6.1' );
$request_data['6.2'] = $field->get_value_export( $entry, '6.2' );
$request_data['6.3'] = $field->get_value_export( $entry, '6.3' );
Combine that with the gform_webhooks_request_data filter:
If you have any other questions, please let us know.