The reason you couldn't find TPM (can also be under 'Security' in the BIOS) is because your mainboard doesn't have a TPM security chip.

Also be aware, that Microsoft have removed 'Remote Desktop' from Windows 11. Yup, thats right its completely gone, blown away, not there anymore. For some people this can be a clincher in deciding whether to upgrade, particularly people that might work from home and need to remote a work PC at a remote location.