My (new) pc is not ready for Windows 11?

Windows 11 requires 4 things at the minimum: UEFI and GPT instead of legacy BIOS, Secure Boot enabled, TPM2 and a processor (CPU) less than 3 years old.

You say new processor - that should work. You say it has a TPM2 chip - that should work.

So make sure the drive is formatted for GPT and that the system uses UEFI (3 partitions: UEFI, Recovery and your main partition).

Make sure Secure Boot is enabled in BIOS.

That should work.

You can run the Microsoft PC Health Check and also the GitHub "Whynotwin11" to produce a checklist of your PC.

I use Whynotwin11 myself. The screen shot below is from my X1 machine and the CPU generation is too old.

I just purchased a new Windows 10 Pro computer: UEFI, Secure Boot, TPM2, and 10th generation Intel CPU. Update says it is ready for Windows 11.

I change the main drive (much bigger now), used the Lenovo Recovery USB key to re-image the computer and I allowed it to update to Windows 11 Pro - running now.