The angled type Allowing you to connect it to a female port, even if space around the port is limited.
The adapter work for one PD power in to Steam Deck and one power out to cooler and light.
The adapter also work for Steam one USB3.1/USB2.0 out and one power out to cooler and light.
Type C connector is the new design for USB 3.1,Reversible Design for Type C connector.
The Type-A Female can't work alone, It needs to work with Type-C Female together.