Non-Surgical BBL? Via fat transfer? How?

Simon Ourian MD has a video on Instagram advertising a "No Scalpel" BBL. He states that it can be done via fat transfer or FDA approved dermal fillers. He says no anesthesia, no cutting. The video shows him injecting huge needles into the buttucks. The description says "Autologous (from your own body) HD fat transfer, or injection of dermal fillers" is how it's done. My question is how? Is this new? How do you get the fat without surgery? This is the Kardashian Surgeon.