Even though the CPU ID reads 16C 32T, the thread count only shows 24 threads. Apparently only the 8 Golden Cove big cores support hyperthreading, while the 8 Gracemont small cores do not. The test sample seems to support only DDR4 memory, but this is probably due to the absence of DDR5 specs in the testing software.
https://www.notebookcheck.net/Intel-Alder-Lake-S-CPU-with-16-cores-and-24-threads-spotted-in-SiSoft-Sandra-benchmark-database.496829.0.html