Add checkboxes automatically from post titles?

Is there any way in Ninja forms to create checkboxes that are automatically populated from certain WordPress fields, like post titles?

I am making a small booking site, with enquiry form instead of direct booking. I need to list hotels and activities (regular posts) in the enquiry form so users can select their choice.

I can do it manually, but it’s not convenient, especially when I add a new hotel or activity.