yes, the key format is what you wrote but it is the one obtained by buying Win10/11 pro over MS Store and read by AIDA64.
There is a silent change by MS about how licenses are handled at least what I can figure out after my new bios update on msi meg Z790 ACE.
The new bios brings some OC Memory optimizations and new microcode's and support for 14th Gen Intel CPU
To be sure before flashing I disabled TPM from bios and here comes the difference, I was able to login directly to Win11 without the idiotic "CHANGE PIN" procedure, no questions asked.
Checked Win status it stated Activated.
Did the flash, set the bios as per my liking but kept TPM Disabled, logged in Win 11 with new bios no question asked and no "CHANGE PIN" BS .
Checked thew activation status and everything is OK.
Don't know for sure but looks like MS did something about the licensing problem or my conversation with MS support and mailing back and forth did something with my account and how it handles the licenses.
I just hope it stays this way and good luck to you people!