https://wccftech.com/intel-core-i3-12100f-i5-12400f-are-among-the-first-of-the-alder-lake-s-series-cpus-to-not-receive-efficient-cores/

Website VideoCardz received leaked marketing information from an unknown source that shows the newest Intel 12th Gen Core Alder Lake-S series CPUs launching in January 2022. The i3 and i5 processor series appear to not be structured to offer Efficient cores. This will be the first time in the Intel Alder Lake family of processors to not have the same hybrid design as the one introduced on the initial chips.

It is to note that the listing does not show the entire 65W series CPUs launching at the beginning of 2022. Along with the two series above, we are also expected to see the 12300F, 12400F, and 12700F as well—all from the sub-series of Intel's 12th Gen Core Alder Lake series.