It is disabled in all consumer Alder lake (and I don't remember if there will be Xeon of that gen with P-core only -- IIRC Intel stop the AVX512 validation late

It is disabled in all consumer Alder lake (and I don't remember if there will be Xeon of that gen with P-core only -- IIRC Intel stop the AVX512 validation late on those cores, but it was still before it was formally finished, so probably not). At one point it worked with some Bios on P-core only chips or if you disabled E-core on hybrid ones, but with up-to-date Intel microcode it does not work anymore.