Does i7 8700K work on Z490?
It doesn't, no. The 8700K is an LGA 1151 rev2 socket compatible processor and Z490 boards have an LGA 1200 socket, meaning they're physically incompatible.
Does i7 8700K have TPM chip?
i7-8700K is TPM 2.0 Compatible with "Intel TXT" built-in (Ref Below) – Windows 11: intel.