Phoenix 2 will likely be marketed under the Ryzen 5 and Ryzen 3 brands rather than the Ryzen 7, with model names like "Ryzen 5 7540U" and "Ryzen 3 7340U".
Slight typo. It's Ryzen 3 7440U, and not 73.
Also, these SKUs would also be using two types of cores, ZEN 4 and ZEN 4c. Either a full flat "Phoenix 2" die, or a cut-down Phoenix 1 die. So that's 2 high+4 low core config, or 8 high-clock cores binned down to '2 high-clock + 4 low-clock' cores (since Zen 4c is just a down-clocked version of Zen 4).
Basically these are dual-sourced chips.
The Zen 4C core is a cut-down version of Zen 4, which is downclocked, making it possible for the APU to bin down from 8 high-clock cores to 2 high-clock and 4 low-clock cores. This is most probably AMD's version of the "hybrid" strategy that was previously revealed.
Zen 4 and Zen 4C cores are mostly the same design in my opinion, but the latter is optimized for "density" and features a lower cache.