As stated and shown at Applelife & InsanelyMac, works with OpenCore + AvoidRuntimeDefrag=No. Not sure about the need to add -lilubetaall boot arg.
Boot loop with Clover (r5142) for the moment on my E7270 Skylake laptop with same config as used for Big Sur and Monterey, only SMBIOS changed to MBP14,1.
I confirm that support for Haswell, Broadwell and Skylake iGPU is dropped, the only graphics framebuffers available in /S/L/E being KBL, CFL and ICL ones.
For AMD, all GPUs older than Polaris generation are dropped.
AppleIntelCPUPowerManagement is dropped too, something we still required on good old C2D, C2Q, 1st gen Core, Sandy Bridge and Ivy Bridge platforms so that could add a few nails in their coffin.