I bought a 24” M3 iMac a couple of weeks ago and was going to use my old Anker USB-A hub with a USB-C adapter for charging devices and back-ups. However I came across this on the Anker website and bought one from the Amazon US site (delivery from the UK site was quoted as March.) It simply attaches to the base of the screen and connects to one of the two Thunderbolt ports via a short lead. It’s a very neat solution and matches my silver iMac perfectly.