According to that report shipments of the new devices are expected to be in limited quantities, although no other information was made available.
The shipments are said to be in limited quantities. No further details are available, but the report is likely referring to suppliers shipping individual components to larger manufacturers for final assembly as the new 27-inch iMac moves towards production.
Various rumors have already penned Apple as planning a 27-inch iMac refresh for the first half of next year, likely bringing Apple silicon to the larger computer.
The 24-inch iMac already uses the M1 chips of course, but the display is smaller than many would like. The launch of a 27-inch model would be popular, as would the switch to mini-LED which would improve brightness among other things. It would specifically bring 120Hz ProMotion to the iMac for the first time, too.
Some reports have previously pointed to this device being a new iMac Pro, although that now seems less likely. However, the iMac Pro has not yet received its Apple silicon refresh although it might also gain a larger display as and when that happens.