Amazon with RAYROW has the RAYROW 6-in-1 USB-C Hub Docking Station Dongle for iPad Pro 2018 / 2020 for $50 - 12% off coupon (check green "Save coupon" box) - $16 off with code VD7MMOFY [Exp 3/3] = $28 with free shipping on $25+ or with Prime.

Features USB-C PD port, 4K HDMI port, 3.5mm audio port, micro SD slot, SD card slot and USB 3.0 port.