@Roman I think you’re confused.
The USB-C port on the F6 Pro has “PD” compatibility, which stands for Power Delivery. The PD spec allows the device to accept and use power from 3.6v 1.5a all the way up to 20v 5a. The F6 Pro will nominally use 12v at up to 2.5a when charging, via USB-C PD.
The device listed above is a multi-USB charger with a USB-C PD power output. That’s the small USB-C port at the top. Using a USB-C to USB-C cable, this can be connected to the Teclast laptop to charge it instead of the original charger.
There are also more specific USB-C PD only devices, like the following one, which have only one output designed for laptops. https://www.amazon.co.uk/Charger-Thinkpad-SA10K34710-SA10M13949-Replacement/dp/B07G43781Q/