Read some of these threads; in one of them, somebody appears to have found a solution.
- TPM not found
- TPM - Not Detected
- TPM 2.0 not detected - #3 by Richard_Lee1
- [SOLVED] TPM 2.0 W10 to W11
- How do i update to windows 11 from 10 without reinstalling on framework 13 AMD
TL;DR: Windows 10 does not have a driver for the TPM, and so Windows 11 setup thinks you do not have one.