Peat moss is used in many bagged potting soils as well as bulk soils and amendments that can be purchased by the cubic yard. I try hard not to use it personally and professionally, but sometimes alternatives can't be found locally. Perhaps as a community we can push back with garden centers and landscaping supply companies, and not support peat moss harvesting. This article from Better Homes & Gardens will give you the details you need to make informed decisions regarding greener alternatives.
The Problem with the Peat Moss in Your Pots (and What to Use Instead)
The Problem with the Peat Moss in Your Pots (and What to Use Instead)