24-inch iMac Ports: 4 USB-C Ports and 1 Headphone Jack, That's All
Anker 535 USB-C Hub (5-in-1, for iMac) - Anker US
Guide to Mac, iPad, iPhone ports: Lightning, USB-C, Thunderbolt & more | Macworld
USB C Hub for iMac 24 inch 2021 Minisopuru USB Hub Adapter Support M.2 NVMe | eBay
USB-C Clamp Hub for 24-inch iMac
HyperDrive 6-in-1 USB-C Hub for iMac 24″ – HyperShop.com
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) :
Amazon.com: USB C Hub for iMac 24 inch 2021, Minisopuru USB Hub Adapter Support M.2 NVMe SSD, iMac USB Hub, 7 in 1 iMac Accessories with USB C 10Gbps, USB A 3.2,
HyperDrive 5-in-1 USB-C Hub for iMac 24″ – HyperShop.com
Satechi Launches New USB-C Clamp Hub for M1 iMac - MacRumors
Amazon.com: Hagibis iMac Hub with 4K@60Hz HDMI, USB C 3.1, USB 3.0 Ports and SD/Micro SD Card Reader, USB-C Clamp Hub USB C Docking Station for 2021 iMac 24 inch (with HDMI) :
Satechi USB-C Slim Dock for 24” iMac extends your USB ports & adds extra data storage space » Gadget Flow
Amazon.com: Anker 535 USB C Hub (5-in-1), with 2 USB-A 10 Gbps Data Ports, USB-C 10 Gbps Port, SD and microSD Card Reader, for iMac Pro / iMac 24 inch 2021 / iMac 27 inch / 21.5 inch : Electronics