https://browser.geekbench.com/v6/cpu/1962935 says it was running at 13.54 GHz. https://browser.geekbench.com/v6/cpu/4913899 looks... questionable.
The linked Geekbench result from August running at 7614 MT/s clearly wasn't using CUDIMMs; it was a highly-overclocked system running the memory almost 20% faster than the typical overclocked memory speeds available from reasonably-priced modules.
So it doesn’t invalidate Apple‘s chip being the fastest in single core for a production machine.
E.g. this is one of the top single core benchmark result for any Intel CPU https://browser.geekbench.com/v6/cpu/5568973 and it claims the maximum frequency was stock as well (actually 300 MHz less than thermal velocity boost limits if you count those).
And that a desktop part is going to outperform a laptop part?