Totally agree with your concerns about the usb charging bricks. I only use genuine ones there. I did some further testing with original apple usb-c to lighning cables. Both 18W and 20W managed the same charging speed of around 1500-1600mA in my short test. Maybe I’m fine with only charging older model iPhone?
Thanks, been getting cables from ugreen before but the new price is just a couple dollars cheaper than apple original cables.