Welcome to the forums, Joseph!
From what I recall in my NFP book, culturally breastfeeding (using bottles, pumps, pacifiers, etc.) usually does bring fertility back sooner.
Now, the downside to that, is that even during cultural breastfeeding, “normal” fertility may not return for awhile. A woman’s basal body temperatures, cervical position, and cervical mucus patterns can continue to be difficult to interpret.
So, no guarantees, but as I understand it, cultural breastfeeding usually brings fertility back sooner. I only have experience with ecological breastfeeding, so I’m sorry I can’t offer anything more. :o I’m sure lots of other moms on here can help you out, and correct me if I’m wrong.