DCFC stands for "Direct Current Fast Charger". It basically means the high-powered (direct current) charging stations, such as those run by Electrify America, Chargepoint, EVgo, and other companies (you might need or want an app for whatever company runs the charger). You might also see them referred to as Level 3 chargers. Collectively these make up the fast charging infrastructure for non-Tesla EVs, but Teslas can use them with an appropriate adapter for the connectors (either CCS or CHAdeMO). The trick is that as of now (July 2022), the CCS and CHAdeMO adapters for Teslas aren't being sold in the US yet (in the case of CCS) or anymore (in the case of CHAdeMO).
Bruce.