Amazon.com: Satechi Aluminum Type-C Clamp Hub Pro with USB-C Data Port, USB-A 3.0 Data, Micro/SD Card Reader - Compatible with 2020/2019/2017 iMac & iMac Pro, Does Not Fit 2021 iMac (Silver) :
Type C Hub For Imac 2021 With 4k@60hz Hdmi Usb 3.0 Card Reader Tool Free Imac Hub - Laptop Docking Stations - AliExpress