Here is an adapter to the 12 volt 10Amp, USB-C only takes as much as the connected device demands.
Swaytronic AIOES DC USB-C adapter cable 1m

I can now partly answer the question myself because I bought the unit. The two USB ports on the device (voltage 5Volt, 1x with 1Ampère, 1x with 2A) are not powerful enough to charge a notebook. The supplied connectors for the more powerful sockets (19V 3.5A, 12V 10A) are all round plugs, nothing for my Macbook.
The diversions would probably be: Buy an adapter with a cigarette lighter socket that can be plugged into the 12V 10A port (available in the Swaytronic accessories, not included in the set), and buy a cigarette lighter plug with a USB-C port (and one that has enough power, i.e. not the 'normal' ones that can only charge mobile phones and tablets).

Sorry, it went away as a gift, so I can't answer your question. It is mainly used on the bike.