Image Lightbox/module with custom fields

Hi there,
I have a template setup for a listing – and it has images which are pulled from a custom field which show perfectly fine. But I don’t seem to be able to enable that to be a modal/lightbox. I’ve seen other demos with this but am I right in thinking this is a ACF pro feature to enable this?

Essentially I want images clickable so they popup in a lightbox and get larger if that makes sense.

Also with regards to flex loop filters, I can happily show taxonomies on a search/listing page but don’t seem to be able to show anything from a field group so If I had a custom field for company, I’d like a dropdown so you can filter by company.

Thanks
David

phew thought I was losing my mind.
Thanks