Hello, thank you for your suggestion, on the basis of which the supplier contacted us and would like to respond below.
"We are very sorry to hear about your negative experience with the product. The charger supports declared protocols including USB-C PD 3.1. Some devices may experience power limitations due to specific cable combinations (at least 140W cable is required), internal settings of the powered device, or power profile negotiation. If all the conditions have been met, then it may indeed be a defective item and the product will be replaced immediately at customer support
[email protected]. "
Please do not hesitate to contact us in case of need. Thank you and have a nice day, Ondřej - Alza expert