My wife's Gigabyte Brix GB-BKi7HT2-7500 (little square box 4.5"x4.75"x2"tall) uses a i7-7500U, supports Secure Boot, and gives the choice of supporting TPM 1.2 or 1.3 physically.
When either of the TPM choices is activated, it then shows TPM 2.0 as present.
On a bare metal install Windows 11 just breezed through install, without the slightest hesitation, and activated (she already had had W10 activated), no workarounds required.
So my guess would be that it depends highly on the bios and whether it accesses or makes available all the cpu's functions, especially since the i7-7700HQ is an arguably newer, slightly more advanced cpu that the i7-7500U .
I have a spare machine that I could use as a test workstation. If it did not work, nothing truly lost--just reinstall Windows 10 and 4 more years of updates.I'm holding off on my 2 I7-7700 devices to see if they relent on not providing updates otherwise they will just stay at 10. That is really my only concern with using the registry key to allow installation.