Hi Guys,
I have an I7-14700 with 8 Performance Cores and 12 Efficent-Cores as you can see in Screenshot 3
In screenshot 1 you can see how it looks like on my PC
And in screenshot 2 how it should look like from the Bitsum webpage
But they are enabled as you can see in Screenshot 4
You should have a total of 28 logical cores (threads) on that system.
Therefore, your E-cores appear to be disabled. Check your BIOS/UEFI settings and reset to defaults if you can't find the option to re-enable E-cores.
The HWMonitor screenshot should list cores that begin with "E-core", not only "P-core", as shown in the attached screenshot from a different CPU with fewer total cores.