When trying to build out a template for a CPT (Services) I don't even have the option to select my custom fields. I'm sure I just forgot something. I'm using the Breakdance Builder (I rarely use it, Bricks is my go-to).
All fields in the field group are subfields in a group field. And it is possible the Breakdance builder does not work with the subfield. You can create some top-fields and recheck this. Or contact Breakdance support to get more information.
.
