Hi @v3nt
As you already guessed, I’m afraid that feature does not exist yet. If you need this feature now, I suggest you hire a developer to help you out with it, and I’d recommend looking for one on https://studio.envato.com/ or https://www.upwork.com/. Otherwise, you can always submit a feature request by opening a new ticket here: https://support.advancedcustomfields.com/new-ticket. That way, your request can be passed directly to the plugin author.
Thanks 🙂