I was using a little dock that attached to the chin on my older 27-inch iMac. That dock has a combination of USB ports and SD cards which was nice to be able to access. Any such this for the new 24-inch iMacs?
The new iMac has different speakers and vents, so a new and different solution would be needed.
Satechi might develop something that might work, just don't get your hopes up.
I just got mine earlier this week. Easy install but I was scared to tighten the clamp too much. Seems to stay on well. Have to hold the display when plugging in a usb cable otherwise the iMac rotates. Used it with a thumb drive and my camera connection. Didn’t do any speed tests but speeds seemed normal. Wish I could get it in a matching color. I like it better than the one I had that didn’t attach. I like having the connections on the front.