TPM 2.0 module is already integrated on the mainboard "Asus Prime Z-270A with Intel CORE CPU 7-7700 K" and also on the "Mainboard Z-390 A" with Intel CORE CPU i9-9900K. In the BIOS, only it should be switched to TPM 2.0. Intel CORE CPU 7-7700 is not recognised by Windows 11.
MfG MK

Chance is good that the i9-9900K has TPM built in as this CPU is on the Microsoft list of CPUs supported by Windows 11.

In addition to physical TPM modules, there are also fTPM (firmware TPM, called PTT at Intel).
Intel and AMD have been integrating TPM version 2.0 into their CPUs for several years. To be able to use this, the BIOS of the PC/notebook must support it and it must be activated there.

Intel CPUs from the 8th generation onwards usually have TPM integrated. Intel calls this PTT (Platform Trust Technology). AMD has been integrating TPM as fTPM in the CPUs since the use of the AM4 socket from around 2016.

List of Intel CPUs that officially support Windows 11 https://docs.microsoft.com/en-us...
List of AMD CPUs that officially support Windows 11 https://docs.microsoft.com/en-us...


FAQ about TPM 2.0 https://www.heise.de/select...

Before buying a TPM module for the mainboard, which may be unnecessary, you should check whether the possibility of fTPM / PTT via CPU is possible in the BIOS and whether this only needs to be activated.

Help pages for (f)TPM from various mainboard/PC manufacturers:
ASUS https://www.asus.com/ch-de...
ASUS https://www.asus.com/microsite...
MSI https://www.msi.com/blog...
Gigabyte https://www.gigabyte.com/Press...
Asrock https://www.asrock.com/support...

Computerbase: Windows 11: How to activate TPM 2.0 in the BIOS on AMD and Intel PCs
https://www.computerbase.de/2021-10...

TPM 2.0 is not integrated in the CPU but on the mainboard. Therefore, you have to be careful with the mainboard. Note on the side: If you don't have a mainboard yet and also no CPU, consider buying an intel 10th or 11th generation or, for example, an AMD Ryzen 7 5800X - more performance for your money.