A:Answer I just got this USB-C hub for mine that has several ports. I have a 2010 MacBook Pro and I can connect it via one of the USB ports on the hub.
(found on amazon, but there are probably similar ones at Best Buy)
USB C Hub for iPad Pro 2018, 6 in 1 USB C to 4K HDMI Adapter with USB3.0, SD/TF Card Reader, 3.5mm Headphone Jack, PD Charging, HDMI Converter Compatible with iPad Pro 11"/12.9" 2018 & MacBook Pro