CCS1/2 (DC Fast charging) and J1772 (AC "Slow" charging) share a port on most cars. That is, the CCS plug uses the entire plug and the J1772 part uses just the upper portion of the plug.

The AC "slow" charging in the US only needs to support two-phase power (residential power is two phase) and the EU (and others?) generally need to support three-phase power.

NACS is just better in North America (versus CCS1) because it's smaller and much easier to physically handle, but the AC "slow" charging pinning only supports two phase power.