From the WCCFTech article (for whatever that may be worth),
" With all four chiplets exposed, we can see that underneath them is a 5x4 core configuration which means each die consists of up to 80 cores. However, the entire 80 core silicon will never be released to the public due to the mesh layout."
"Theoretically, Intel's Sapphire Rapids-SP Xeon CPUs could feature a maximum of 72 cores and 144 threads but we know from previous leaks that the maximum configuration is going to end up at 56 cores and 112 threads."
There you both go, Max 72 cores, retail at 56.