Review on USB C Female to Female Adapter (2 Pack) PD 100W Quick Charge Type C Coupler Extender Extension Connector for Thunderbolt 3 MacBook, Nintendo Switch, Samsung - Cellularize by Brian Lee

You will need to use a right angle USB-C cable to power your Raspberry Pi via the Canakit power supply which comes with a built in switch. I used this to connect the male end of a rectangular power cord to the male end of a Canakit switch. Worked like a charm and saved me from buying a new switch/power supply. I used heat shrink tubing to permanently hold this adapter to the switch. Excellent purchase!