I put windows 11 on my old PC. It's a i7 5930K. It's definitely not supposed to work with Windows 11. But it works just fine after bypassing the hardware checks.
The checks seem to only occur when the installer is running.
Any source for hardware check bypass I haven’t had a need to dig for one until recently and am deeper into software engineering than reverse/bypass engineering.
I used rufus to install W11 (running i7-4790k) and haven't had any issues with it. The only reason an update would cause issues is if they started requiring specific CPU instructions your CPU doesn't support (like when W11 started requiring POPCNT, which is only in gen 1 CPUs and newer). I don't think its likely they'd make such a upgrade in W11 again. Any new CPU instruction limitations would probably be a W12 thing at this point.